includes/EditPage.php

   1 <?php
   2 /**
   3  * User interface for page editing.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * The edit page/HTML interface (split from Article)
  25  * The actual database and text munging is still in Article,
  26  * but it should get easier to call those from alternate
  27  * interfaces.
  28  *
  29  * EditPage cares about two distinct titles:
  30  * $this->mContextTitle is the page that forms submit to, links point to,
  31  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  32  * page in the database that is actually being edited. These are
  33  * usually the same, but they are now allowed to be different.
  34  *
  35  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  36  * headaches, which may be fatal.
  37  */
  38 class EditPage {
  39         /**
  40          * Status: Article successfully updated
  41          */
  42         const AS_SUCCESS_UPDATE = 200;
  43
  44         /**
  45          * Status: Article successfully created
  46          */
  47         const AS_SUCCESS_NEW_ARTICLE = 201;
  48
  49         /**
  50          * Status: Article update aborted by a hook function
  51          */
  52         const AS_HOOK_ERROR = 210;
  53
  54         /**
  55          * Status: A hook function returned an error
  56          */
  57         const AS_HOOK_ERROR_EXPECTED = 212;
  58
  59         /**
  60          * Status: User is blocked from editing this page
  61          */
  62         const AS_BLOCKED_PAGE_FOR_USER = 215;
  63
  64         /**
  65          * Status: Content too big (> $wgMaxArticleSize)
  66          */
  67         const AS_CONTENT_TOO_BIG = 216;
  68
  69         /**
  70          * Status: this anonymous user is not allowed to edit this page
  71          */
  72         const AS_READ_ONLY_PAGE_ANON = 218;
  73
  74         /**
  75          * Status: this logged in user is not allowed to edit this page
  76          */
  77         const AS_READ_ONLY_PAGE_LOGGED = 219;
  78
  79         /**
  80          * Status: wiki is in readonly mode (wfReadOnly() == true)
  81          */
  82         const AS_READ_ONLY_PAGE = 220;
  83
  84         /**
  85          * Status: rate limiter for action 'edit' was tripped
  86          */
  87         const AS_RATE_LIMITED = 221;
  88
  89         /**
  90          * Status: article was deleted while editing and param wpRecreate == false or form
  91          * was not posted
  92          */
  93         const AS_ARTICLE_WAS_DELETED = 222;
  94
  95         /**
  96          * Status: user tried to create this page, but is not allowed to do that
  97          * ( Title->userCan('create') == false )
  98          */
  99         const AS_NO_CREATE_PERMISSION = 223;
 100
 101         /**
 102          * Status: user tried to create a blank page and wpIgnoreBlankArticle == false
 103          */
 104         const AS_BLANK_ARTICLE = 224;
 105
 106         /**
 107          * Status: (non-resolvable) edit conflict
 108          */
 109         const AS_CONFLICT_DETECTED = 225;
 110
 111         /**
 112          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 113          * editing in his own userspace or talkspace and wpIgnoreBlankSummary == false
 114          */
 115         const AS_SUMMARY_NEEDED = 226;
 116
 117         /**
 118          * Status: user tried to create a new section without content
 119          */
 120         const AS_TEXTBOX_EMPTY = 228;
 121
 122         /**
 123          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 124          */
 125         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 126
 127         /**
 128          * Status: WikiPage::doEdit() was unsuccessful
 129          */
 130         const AS_END = 231;
 131
 132         /**
 133          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 134          */
 135         const AS_SPAM_ERROR = 232;
 136
 137         /**
 138          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 139          */
 140         const AS_IMAGE_REDIRECT_ANON = 233;
 141
 142         /**
 143          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 144          */
 145         const AS_IMAGE_REDIRECT_LOGGED = 234;
 146
 147         /**
 148          * Status: can't parse content
 149          */
 150         const AS_PARSE_ERROR = 240;
 151
 152         /**
 153          * HTML id and name for the beginning of the edit form.
 154          */
 155         const EDITFORM_ID = 'editform';
 156
 157         /**
 158          * Prefix of key for cookie used to pass post-edit state.
 159          * The revision id edited is added after this
 160          */
 161         const POST_EDIT_COOKIE_KEY_PREFIX = 'PostEditRevision';
 162
 163         /**
 164          * Duration of PostEdit cookie, in seconds.
 165          * The cookie will be removed instantly if the JavaScript runs.
 166          *
 167          * Otherwise, though, we don't want the cookies to accumulate.
 168          * RFC 2109 ( https://www.ietf.org/rfc/rfc2109.txt ) specifies a possible
 169          * limit of only 20 cookies per domain. This still applies at least to some
 170          * versions of IE without full updates:
 171          * https://blogs.msdn.com/b/ieinternals/archive/2009/08/20/wininet-ie-cookie-internals-faq.aspx
 172          *
 173          * A value of 20 minutes should be enough to take into account slow loads and minor
 174          * clock skew while still avoiding cookie accumulation when JavaScript is turned off.
 175          */
 176         const POST_EDIT_COOKIE_DURATION = 1200;
 177
 178         /** @var Article */
 179         public $mArticle;
 180
 181         /** @var Title */
 182         public $mTitle;
 183
 184         /** @var null|Title */
 185         private $mContextTitle = null;
 186
 187         /** @var string */
 188         protected $action = 'submit';
 189
 190         /** @var bool */
 191         public $isConflict = false;
 192
 193         /** @var bool */
 194         public $isCssJsSubpage = false;
 195
 196         /** @var bool */
 197         public $isCssSubpage = false;
 198
 199         /** @var bool */
 200         public $isJsSubpage = false;
 201
 202         /** @var bool */
 203         protected $isWrongCaseCssJsPage = false;
 204
 205         /** @var bool New page or new section */
 206         protected $isNew = false;
 207
 208         /** @var bool */
 209         protected $deletedSinceEdit;
 210
 211         /** @var string */
 212         public $formtype;
 213
 214         /** @var bool */
 215         public $firsttime;
 216
 217         /** @var bool|stdClass */
 218         protected $lastDelete;
 219
 220         /** @var bool */
 221         protected $mTokenOk = false;
 222
 223         /** @var bool */
 224         protected $mTokenOkExceptSuffix = false;
 225
 226         /** @var bool */
 227         protected $mTriedSave = false;
 228
 229         /** @var bool */
 230         protected $incompleteForm = false;
 231
 232         /** @var bool */
 233         protected $tooBig = false;
 234
 235         /** @var bool */
 236         protected $kblength = false;
 237
 238         /** @var bool */
 239         protected $missingComment = false;
 240
 241         /** @var bool */
 242         protected $missingSummary = false;
 243
 244         /** @var bool */
 245         protected $allowBlankSummary = false;
 246
 247         /** @var bool */
 248         protected $blankArticle = false;
 249
 250         /** @var bool */
 251         protected $allowBlankArticle = false;
 252
 253         /** @var string */
 254         protected $autoSumm = '';
 255
 256         /** @var string */
 257         public $hookError = '';
 258
 259         /** @var ParserOutput */
 260         protected $mParserOutput;
 261
 262         /** @var bool Has a summary been preset using GET parameter &summary= ? */
 263         protected $hasPresetSummary = false;
 264
 265         /** @var bool */
 266         protected $mBaseRevision = false;
 267
 268         /** @var bool */
 269         public $mShowSummaryField = true;
 270
 271         # Form values
 272
 273         /** @var bool */
 274         public $save = false;
 275
 276         /** @var bool */
 277         public $preview = false;
 278
 279         /** @var bool */
 280         protected $diff = false;
 281
 282         /** @var bool */
 283         public $minoredit = false;
 284
 285         /** @var bool */
 286         protected $watchthis = false;
 287
 288         /** @var bool */
 289         protected $recreate = false;
 290
 291         /** @var string */
 292         public $textbox1 = '';
 293
 294         /** @var string */
 295         public $textbox2 = '';
 296
 297         /** @var string */
 298         public $summary = '';
 299
 300         /** @var bool */
 301         protected $nosummary = false;
 302
 303         /** @var string */
 304         public $edittime = '';
 305
 306         /** @var string */
 307         public $section = '';
 308
 309         /** @var string */
 310         public $sectiontitle = '';
 311
 312         /** @var string */
 313         protected $starttime = '';
 314
 315         /** @var int */
 316         public $oldid = 0;
 317
 318         /** @var string */
 319         protected $editintro = '';
 320
 321         /** @var null */
 322         public $scrolltop = null;
 323
 324         /** @var bool */
 325         public $bot = true;
 326
 327         /** @var null|string */
 328         public $contentModel = null;
 329
 330         /** @var null|string */
 331         public $contentFormat = null;
 332
 333         # Placeholders for text injection by hooks (must be HTML)
 334         # extensions should take care to _append_ to the present value
 335
 336         /** @var string Before even the preview */
 337         public $editFormPageTop = '';
 338         public $editFormTextTop = '';
 339         public $editFormTextBeforeContent = '';
 340         public $editFormTextAfterWarn = '';
 341         public $editFormTextAfterTools = '';
 342         public $editFormTextBottom = '';
 343         public $editFormTextAfterContent = '';
 344         public $previewTextAfterContent = '';
 345         public $mPreloadContent = null;
 346
 347         /* $didSave should be set to true whenever an article was successfully altered. */
 348         public $didSave = false;
 349         public $undidRev = 0;
 350
 351         public $suppressIntro = false;
 352
 353         /** @var bool Set to true to allow editing of non-text content types. */
 354         public $allowNonTextContent = false;
 355
 356         /** @var bool */
 357         protected $edit;
 358
 359         /** @var bool */
 360         public $live;
 361
 362         /**
 363          * @param Article $article
 364          */
 365         public function __construct( Article $article ) {
 366                 $this->mArticle = $article;
 367                 $this->mTitle = $article->getTitle();
 368
 369                 $this->contentModel = $this->mTitle->getContentModel();
 370
 371                 $handler = ContentHandler::getForModelID( $this->contentModel );
 372                 $this->contentFormat = $handler->getDefaultFormat();
 373         }
 374
 375         /**
 376          * @return Article
 377          */
 378         public function getArticle() {
 379                 return $this->mArticle;
 380         }
 381
 382         /**
 383          * @since 1.19
 384          * @return Title
 385          */
 386         public function getTitle() {
 387                 return $this->mTitle;
 388         }
 389
 390         /**
 391          * Set the context Title object
 392          *
 393          * @param Title|null $title Title object or null
 394          */
 395         public function setContextTitle( $title ) {
 396                 $this->mContextTitle = $title;
 397         }
 398
 399         /**
 400          * Get the context title object.
 401          * If not set, $wgTitle will be returned. This behavior might change in
 402          * the future to return $this->mTitle instead.
 403          *
 404          * @return Title
 405          */
 406         public function getContextTitle() {
 407                 if ( is_null( $this->mContextTitle ) ) {
 408                         global $wgTitle;
 409                         return $wgTitle;
 410                 } else {
 411                         return $this->mContextTitle;
 412                 }
 413         }
 414
 415         /**
 416          * Returns if the given content model is editable.
 417          *
 418          * @param string $modelId The ID of the content model to test. Use CONTENT_MODEL_XXX constants.
 419          * @return bool
 420          * @throws MWException If $modelId has no known handler
 421          */
 422         public function isSupportedContentModel( $modelId ) {
 423                 return $this->allowNonTextContent ||
 424                         ContentHandler::getForModelID( $modelId ) instanceof TextContentHandler;
 425         }
 426
 427         function submit() {
 428                 $this->edit();
 429         }
 430
 431         /**
 432          * This is the function that gets called for "action=edit". It
 433          * sets up various member variables, then passes execution to
 434          * another function, usually showEditForm()
 435          *
 436          * The edit form is self-submitting, so that when things like
 437          * preview and edit conflicts occur, we get the same form back
 438          * with the extra stuff added.  Only when the final submission
 439          * is made and all is well do we actually save and redirect to
 440          * the newly-edited page.
 441          */
 442         function edit() {
 443                 global $wgOut, $wgRequest, $wgUser;
 444                 // Allow extensions to modify/prevent this form or submission
 445                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 446                         return;
 447                 }
 448
 449                 wfProfileIn( __METHOD__ );
 450                 wfDebug( __METHOD__ . ": enter\n" );
 451
 452                 // If they used redlink=1 and the page exists, redirect to the main article
 453                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 454                         $wgOut->redirect( $this->mTitle->getFullURL() );
 455                         wfProfileOut( __METHOD__ );
 456                         return;
 457                 }
 458
 459                 $this->importFormData( $wgRequest );
 460                 $this->firsttime = false;
 461
 462                 if ( $this->live ) {
 463                         $this->livePreview();
 464                         wfProfileOut( __METHOD__ );
 465                         return;
 466                 }
 467
 468                 if ( wfReadOnly() && $this->save ) {
 469                         // Force preview
 470                         $this->save = false;
 471                         $this->preview = true;
 472                 }
 473
 474                 if ( $this->save ) {
 475                         $this->formtype = 'save';
 476                 } elseif ( $this->preview ) {
 477                         $this->formtype = 'preview';
 478                 } elseif ( $this->diff ) {
 479                         $this->formtype = 'diff';
 480                 } else { # First time through
 481                         $this->firsttime = true;
 482                         if ( $this->previewOnOpen() ) {
 483                                 $this->formtype = 'preview';
 484                         } else {
 485                                 $this->formtype = 'initial';
 486                         }
 487                 }
 488
 489                 $permErrors = $this->getEditPermissionErrors();
 490                 if ( $permErrors ) {
 491                         wfDebug( __METHOD__ . ": User can't edit\n" );
 492                         // Auto-block user's IP if the account was "hard" blocked
 493                         $wgUser->spreadAnyEditBlock();
 494
 495                         $this->displayPermissionsError( $permErrors );
 496
 497                         wfProfileOut( __METHOD__ );
 498                         return;
 499                 }
 500
 501                 wfProfileIn( __METHOD__ . "-business-end" );
 502
 503                 $this->isConflict = false;
 504                 // css / js subpages of user pages get a special treatment
 505                 $this->isCssJsSubpage = $this->mTitle->isCssJsSubpage();
 506                 $this->isCssSubpage = $this->mTitle->isCssSubpage();
 507                 $this->isJsSubpage = $this->mTitle->isJsSubpage();
 508                 // @todo FIXME: Silly assignment.
 509                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 510
 511                 # Show applicable editing introductions
 512                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 513                         $this->showIntro();
 514                 }
 515
 516                 # Attempt submission here.  This will check for edit conflicts,
 517                 # and redundantly check for locked database, blocked IPs, etc.
 518                 # that edit() already checked just in case someone tries to sneak
 519                 # in the back door with a hand-edited submission URL.
 520
 521                 if ( 'save' == $this->formtype ) {
 522                         if ( !$this->attemptSave() ) {
 523                                 wfProfileOut( __METHOD__ . "-business-end" );
 524                                 wfProfileOut( __METHOD__ );
 525                                 return;
 526                         }
 527                 }
 528
 529                 # First time through: get contents, set time for conflict
 530                 # checking, etc.
 531                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 532                         if ( $this->initialiseForm() === false ) {
 533                                 $this->noSuchSectionPage();
 534                                 wfProfileOut( __METHOD__ . "-business-end" );
 535                                 wfProfileOut( __METHOD__ );
 536                                 return;
 537                         }
 538
 539                         if ( !$this->mTitle->getArticleID() ) {
 540                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 541                         } else {
 542                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 543                         }
 544
 545                 }
 546
 547                 $this->showEditForm();
 548                 wfProfileOut( __METHOD__ . "-business-end" );
 549                 wfProfileOut( __METHOD__ );
 550         }
 551
 552         /**
 553          * @return array
 554          */
 555         protected function getEditPermissionErrors() {
 556                 global $wgUser;
 557                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 558                 # Can this title be created?
 559                 if ( !$this->mTitle->exists() ) {
 560                         $permErrors = array_merge( $permErrors,
 561                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 562                 }
 563                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 564                 $remove = array();
 565                 foreach ( $permErrors as $error ) {
 566                         if ( ( $this->preview || $this->diff )
 567                                 && ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' )
 568                         ) {
 569                                 $remove[] = $error;
 570                         }
 571                 }
 572                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 573                 return $permErrors;
 574         }
 575
 576         /**
 577          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 578          * but with the following differences:
 579          * - If redlink=1, the user will be redirected to the page
 580          * - If there is content to display or the error occurs while either saving,
 581          *   previewing or showing the difference, it will be a
 582          *   "View source for ..." page displaying the source code after the error message.
 583          *
 584          * @since 1.19
 585          * @param array $permErrors Array of permissions errors, as returned by
 586          *    Title::getUserPermissionsErrors().
 587          * @throws PermissionsError
 588          */
 589         protected function displayPermissionsError( array $permErrors ) {
 590                 global $wgRequest, $wgOut;
 591
 592                 if ( $wgRequest->getBool( 'redlink' ) ) {
 593                         // The edit page was reached via a red link.
 594                         // Redirect to the article page and let them click the edit tab if
 595                         // they really want a permission error.
 596                         $wgOut->redirect( $this->mTitle->getFullURL() );
 597                         return;
 598                 }
 599
 600                 $content = $this->getContentObject();
 601
 602                 # Use the normal message if there's nothing to display
 603                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 604                         $action = $this->mTitle->exists() ? 'edit' :
 605                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 606                         throw new PermissionsError( $action, $permErrors );
 607                 }
 608
 609                 wfRunHooks( 'EditPage::showReadOnlyForm:initial', array( $this, &$wgOut ) );
 610
 611                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 612                 $wgOut->setPageTitle( wfMessage(
 613                         'viewsource-title',
 614                         $this->getContextTitle()->getPrefixedText()
 615                 ) );
 616                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 617                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 618                 $wgOut->addHTML( "<hr />\n" );
 619
 620                 # If the user made changes, preserve them when showing the markup
 621                 # (This happens when a user is blocked during edit, for instance)
 622                 if ( !$this->firsttime ) {
 623                         $text = $this->textbox1;
 624                         $wgOut->addWikiMsg( 'viewyourtext' );
 625                 } else {
 626                         $text = $this->toEditText( $content );
 627                         $wgOut->addWikiMsg( 'viewsourcetext' );
 628                 }
 629
 630                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 631
 632                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 633                         Linker::formatTemplates( $this->getTemplates() ) ) );
 634
 635                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
 636
 637                 if ( $this->mTitle->exists() ) {
 638                         $wgOut->returnToMain( null, $this->mTitle );
 639                 }
 640         }
 641
 642         /**
 643          * Should we show a preview when the edit form is first shown?
 644          *
 645          * @return bool
 646          */
 647         protected function previewOnOpen() {
 648                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 649                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 650                         // Explicit override from request
 651                         return true;
 652                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 653                         // Explicit override from request
 654                         return false;
 655                 } elseif ( $this->section == 'new' ) {
 656                         // Nothing *to* preview for new sections
 657                         return false;
 658                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() )
 659                         && $wgUser->getOption( 'previewonfirst' )
 660                 ) {
 661                         // Standard preference behavior
 662                         return true;
 663                 } elseif ( !$this->mTitle->exists()
 664                         && isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 665                         && $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]
 666                 ) {
 667                         // Categories are special
 668                         return true;
 669                 } else {
 670                         return false;
 671                 }
 672         }
 673
 674         /**
 675          * Checks whether the user entered a skin name in uppercase,
 676          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 677          *
 678          * @return bool
 679          */
 680         protected function isWrongCaseCssJsPage() {
 681                 if ( $this->mTitle->isCssJsSubpage() ) {
 682                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 683                         $skins = array_merge(
 684                                 array_keys( Skin::getSkinNames() ),
 685                                 array( 'common' )
 686                         );
 687                         return !in_array( $name, $skins )
 688                                 && in_array( strtolower( $name ), $skins );
 689                 } else {
 690                         return false;
 691                 }
 692         }
 693
 694         /**
 695          * Returns whether section editing is supported for the current page.
 696          * Subclasses may override this to replace the default behavior, which is
 697          * to check ContentHandler::supportsSections.
 698          *
 699          * @return bool True if this edit page supports sections, false otherwise.
 700          */
 701         protected function isSectionEditSupported() {
 702                 $contentHandler = ContentHandler::getForTitle( $this->mTitle );
 703                 return $contentHandler->supportsSections();
 704         }
 705
 706         /**
 707          * This function collects the form data and uses it to populate various member variables.
 708          * @param WebRequest $request
 709          * @throws ErrorPageError
 710          */
 711         function importFormData( &$request ) {
 712                 global $wgContLang, $wgUser;
 713
 714                 wfProfileIn( __METHOD__ );
 715
 716                 # Section edit can come from either the form or a link
 717                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 718
 719                 if ( $this->section !== null && $this->section !== '' && !$this->isSectionEditSupported() ) {
 720                         wfProfileOut( __METHOD__ );
 721                         throw new ErrorPageError( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
 722                 }
 723
 724                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 725
 726                 if ( $request->wasPosted() ) {
 727                         # These fields need to be checked for encoding.
 728                         # Also remove trailing whitespace, but don't remove _initial_
 729                         # whitespace from the text boxes. This may be significant formatting.
 730                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 731                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 732                                 // Skip this if wpTextbox2 has input, it indicates that we came
 733                                 // from a conflict page with raw page text, not a custom form
 734                                 // modified by subclasses
 735                                 wfProfileIn( get_class( $this ) . "::importContentFormData" );
 736                                 $textbox1 = $this->importContentFormData( $request );
 737                                 if ( $textbox1 !== null ) {
 738                                         $this->textbox1 = $textbox1;
 739                                 }
 740
 741                                 wfProfileOut( get_class( $this ) . "::importContentFormData" );
 742                         }
 743
 744                         # Truncate for whole multibyte characters
 745                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 746
 747                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 748                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 749                         # section titles.
 750                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 751
 752                         # Treat sectiontitle the same way as summary.
 753                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 754                         # currently doing double duty as both edit summary and section title. Right now this
 755                         # is just to allow API edits to work around this limitation, but this should be
 756                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 757                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 758                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 759
 760                         $this->edittime = $request->getVal( 'wpEdittime' );
 761                         $this->starttime = $request->getVal( 'wpStarttime' );
 762
 763                         $undidRev = $request->getInt( 'wpUndidRevision' );
 764                         if ( $undidRev ) {
 765                                 $this->undidRev = $undidRev;
 766                         }
 767
 768                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 769
 770                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 771                                 // wpTextbox1 field is missing, possibly due to being "too big"
 772                                 // according to some filter rules such as Suhosin's setting for
 773                                 // suhosin.request.max_value_length (d'oh)
 774                                 $this->incompleteForm = true;
 775                         } else {
 776                                 // If we receive the last parameter of the request, we can fairly
 777                                 // claim the POST request has not been truncated.
 778
 779                                 // TODO: softened the check for cutover.  Once we determine
 780                                 // that it is safe, we should complete the transition by
 781                                 // removing the "edittime" clause.
 782                                 $this->incompleteForm = ( !$request->getVal( 'wpUltimateParam' ) && is_null( $this->edittime ) );
 783                         }
 784                         if ( $this->incompleteForm ) {
 785                                 # If the form is incomplete, force to preview.
 786                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 787                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 788                                 $this->preview = true;
 789                         } else {
 790                                 /* Fallback for live preview */
 791                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 792                                 $this->diff = $request->getCheck( 'wpDiff' );
 793
 794                                 // Remember whether a save was requested, so we can indicate
 795                                 // if we forced preview due to session failure.
 796                                 $this->mTriedSave = !$this->preview;
 797
 798                                 if ( $this->tokenOk( $request ) ) {
 799                                         # Some browsers will not report any submit button
 800                                         # if the user hits enter in the comment box.
 801                                         # The unmarked state will be assumed to be a save,
 802                                         # if the form seems otherwise complete.
 803                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 804                                 } elseif ( $this->diff ) {
 805                                         # Failed token check, but only requested "Show Changes".
 806                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 807                                 } else {
 808                                         # Page might be a hack attempt posted from
 809                                         # an external site. Preview instead of saving.
 810                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 811                                         $this->preview = true;
 812                                 }
 813                         }
 814                         $this->save = !$this->preview && !$this->diff;
 815                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 816                                 $this->edittime = null;
 817                         }
 818
 819                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 820                                 $this->starttime = null;
 821                         }
 822
 823                         $this->recreate = $request->getCheck( 'wpRecreate' );
 824
 825                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 826                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 827
 828                         # Don't force edit summaries when a user is editing their own user or talk page
 829                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK )
 830                                 && $this->mTitle->getText() == $wgUser->getName()
 831                         ) {
 832                                 $this->allowBlankSummary = true;
 833                         } else {
 834                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' )
 835                                         || !$wgUser->getOption( 'forceeditsummary' );
 836                         }
 837
 838                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 839
 840                         $this->allowBlankArticle = $request->getBool( 'wpIgnoreBlankArticle' );
 841                 } else {
 842                         # Not a posted form? Start with nothing.
 843                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 844                         $this->textbox1 = '';
 845                         $this->summary = '';
 846                         $this->sectiontitle = '';
 847                         $this->edittime = '';
 848                         $this->starttime = wfTimestampNow();
 849                         $this->edit = false;
 850                         $this->preview = false;
 851                         $this->save = false;
 852                         $this->diff = false;
 853                         $this->minoredit = false;
 854                         // Watch may be overridden by request parameters
 855                         $this->watchthis = $request->getBool( 'watchthis', false );
 856                         $this->recreate = false;
 857
 858                         // When creating a new section, we can preload a section title by passing it as the
 859                         // preloadtitle parameter in the URL (Bug 13100)
 860                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 861                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 862                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 863                                 $this->summary = $request->getVal( 'preloadtitle' );
 864                         } elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 865                                 $this->summary = $request->getText( 'summary' );
 866                                 if ( $this->summary !== '' ) {
 867                                         $this->hasPresetSummary = true;
 868                                 }
 869                         }
 870
 871                         if ( $request->getVal( 'minor' ) ) {
 872                                 $this->minoredit = true;
 873                         }
 874                 }
 875
 876                 $this->oldid = $request->getInt( 'oldid' );
 877
 878                 $this->bot = $request->getBool( 'bot', true );
 879                 $this->nosummary = $request->getBool( 'nosummary' );
 880
 881                 // May be overridden by revision.
 882                 $this->contentModel = $request->getText( 'model', $this->contentModel );
 883                 // May be overridden by revision.
 884                 $this->contentFormat = $request->getText( 'format', $this->contentFormat );
 885
 886                 if ( !ContentHandler::getForModelID( $this->contentModel )
 887                         ->isSupportedFormat( $this->contentFormat )
 888                 ) {
 889                         throw new ErrorPageError(
 890                                 'editpage-notsupportedcontentformat-title',
 891                                 'editpage-notsupportedcontentformat-text',
 892                                 array( $this->contentFormat, ContentHandler::getLocalizedName( $this->contentModel ) )
 893                         );
 894                 }
 895
 896                 /**
 897                  * @todo Check if the desired model is allowed in this namespace, and if
 898                  *   a transition from the page's current model to the new model is
 899                  *   allowed.
 900                  */
 901
 902                 $this->live = $request->getCheck( 'live' );
 903                 $this->editintro = $request->getText( 'editintro',
 904                         // Custom edit intro for new sections
 905                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 906
 907                 // Allow extensions to modify form data
 908                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 909
 910                 wfProfileOut( __METHOD__ );
 911         }
 912
 913         /**
 914          * Subpage overridable method for extracting the page content data from the
 915          * posted form to be placed in $this->textbox1, if using customized input
 916          * this method should be overridden and return the page text that will be used
 917          * for saving, preview parsing and so on...
 918          *
 919          * @param WebRequest $request
 920          */
 921         protected function importContentFormData( &$request ) {
 922                 return; // Don't do anything, EditPage already extracted wpTextbox1
 923         }
 924
 925         /**
 926          * Initialise form fields in the object
 927          * Called on the first invocation, e.g. when a user clicks an edit link
 928          * @return bool If the requested section is valid
 929          */
 930         function initialiseForm() {
 931                 global $wgUser;
 932                 $this->edittime = $this->mArticle->getTimestamp();
 933
 934                 $content = $this->getContentObject( false ); #TODO: track content object?!
 935                 if ( $content === false ) {
 936                         return false;
 937                 }
 938                 $this->textbox1 = $this->toEditText( $content );
 939
 940                 // activate checkboxes if user wants them to be always active
 941                 # Sort out the "watch" checkbox
 942                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 943                         # Watch all edits
 944                         $this->watchthis = true;
 945                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 946                         # Watch creations
 947                         $this->watchthis = true;
 948                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 949                         # Already watched
 950                         $this->watchthis = true;
 951                 }
 952                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 953                         $this->minoredit = true;
 954                 }
 955                 if ( $this->textbox1 === false ) {
 956                         return false;
 957                 }
 958                 return true;
 959         }
 960
 961         /**
 962          * Fetch initial editing page content.
 963          *
 964          * @param string|bool $def_text
 965          * @return string|bool String on success, $def_text for invalid sections
 966          * @private
 967          * @deprecated since 1.21, get WikiPage::getContent() instead.
 968          */
 969         function getContent( $def_text = false ) {
 970                 ContentHandler::deprecated( __METHOD__, '1.21' );
 971
 972                 if ( $def_text !== null && $def_text !== false && $def_text !== '' ) {
 973                         $def_content = $this->toEditContent( $def_text );
 974                 } else {
 975                         $def_content = false;
 976                 }
 977
 978                 $content = $this->getContentObject( $def_content );
 979
 980                 // Note: EditPage should only be used with text based content anyway.
 981                 return $this->toEditText( $content );
 982         }
 983
 984         /**
 985          * @param Content|null $def_content The default value to return
 986          *
 987          * @return Content|null Content on success, $def_content for invalid sections
 988          *
 989          * @since 1.21
 990          */
 991         protected function getContentObject( $def_content = null ) {
 992                 global $wgOut, $wgRequest, $wgUser, $wgContLang;
 993
 994                 wfProfileIn( __METHOD__ );
 995
 996                 $content = false;
 997
 998                 // For message page not locally set, use the i18n message.
 999                 // For other non-existent articles, use preload text if any.
1000                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
1001                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
1002                                 # If this is a system message, get the default text.
1003                                 $msg = $this->mTitle->getDefaultMessageText();
1004
1005                                 $content = $this->toEditContent( $msg );
1006                         }
1007                         if ( $content === false ) {
1008                                 # If requested, preload some text.
1009                                 $preload = $wgRequest->getVal( 'preload',
1010                                         // Custom preload text for new sections
1011                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
1012                                 $params = $wgRequest->getArray( 'preloadparams', array() );
1013
1014                                 $content = $this->getPreloadedContent( $preload, $params );
1015                         }
1016                 // For existing pages, get text based on "undo" or section parameters.
1017                 } else {
1018                         if ( $this->section != '' ) {
1019                                 // Get section edit text (returns $def_text for invalid sections)
1020                                 $orig = $this->getOriginalContent( $wgUser );
1021                                 $content = $orig ? $orig->getSection( $this->section ) : null;
1022
1023                                 if ( !$content ) {
1024                                         $content = $def_content;
1025                                 }
1026                         } else {
1027                                 $undoafter = $wgRequest->getInt( 'undoafter' );
1028                                 $undo = $wgRequest->getInt( 'undo' );
1029
1030                                 if ( $undo > 0 && $undoafter > 0 ) {
1031
1032                                         $undorev = Revision::newFromId( $undo );
1033                                         $oldrev = Revision::newFromId( $undoafter );
1034
1035                                         # Sanity check, make sure it's the right page,
1036                                         # the revisions exist and they were not deleted.
1037                                         # Otherwise, $content will be left as-is.
1038                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
1039                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
1040                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
1041
1042                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
1043
1044                                                 if ( $content === false ) {
1045                                                         # Warn the user that something went wrong
1046                                                         $undoMsg = 'failure';
1047                                                 } else {
1048                                                         $oldContent = $this->mArticle->getPage()->getContent( Revision::RAW );
1049                                                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
1050                                                         $newContent = $content->preSaveTransform( $this->mTitle, $wgUser, $popts );
1051
1052                                                         if ( $newContent->equals( $oldContent ) ) {
1053                                                                 # Tell the user that the undo results in no change,
1054                                                                 # i.e. the revisions were already undone.
1055                                                                 $undoMsg = 'nochange';
1056                                                                 $content = false;
1057                                                         } else {
1058                                                                 # Inform the user of our success and set an automatic edit summary
1059                                                                 $undoMsg = 'success';
1060
1061                                                                 # If we just undid one rev, use an autosummary
1062                                                                 $firstrev = $oldrev->getNext();
1063                                                                 if ( $firstrev && $firstrev->getId() == $undo ) {
1064                                                                         $userText = $undorev->getUserText();
1065                                                                         if ( $userText === '' ) {
1066                                                                                 $undoSummary = wfMessage(
1067                                                                                         'undo-summary-username-hidden',
1068                                                                                         $undo
1069                                                                                 )->inContentLanguage()->text();
1070                                                                         } else {
1071                                                                                 $undoSummary = wfMessage(
1072                                                                                         'undo-summary',
1073                                                                                         $undo,
1074                                                                                         $userText
1075                                                                                 )->inContentLanguage()->text();
1076                                                                         }
1077                                                                         if ( $this->summary === '' ) {
1078                                                                                 $this->summary = $undoSummary;
1079                                                                         } else {
1080                                                                                 $this->summary = $undoSummary . wfMessage( 'colon-separator' )
1081                                                                                         ->inContentLanguage()->text() . $this->summary;
1082                                                                         }
1083                                                                         $this->undidRev = $undo;
1084                                                                 }
1085                                                                 $this->formtype = 'diff';
1086                                                         }
1087                                                 }
1088                                         } else {
1089                                                 // Failed basic sanity checks.
1090                                                 // Older revisions may have been removed since the link
1091                                                 // was created, or we may simply have got bogus input.
1092                                                 $undoMsg = 'norev';
1093                                         }
1094
1095                                         // Messages: undo-success, undo-failure, undo-norev, undo-nochange
1096                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
1097                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
1098                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
1099                                 }
1100
1101                                 if ( $content === false ) {
1102                                         $content = $this->getOriginalContent( $wgUser );
1103                                 }
1104                         }
1105                 }
1106
1107                 wfProfileOut( __METHOD__ );
1108                 return $content;
1109         }
1110
1111         /**
1112          * Get the content of the wanted revision, without section extraction.
1113          *
1114          * The result of this function can be used to compare user's input with
1115          * section replaced in its context (using WikiPage::replaceSection())
1116          * to the original text of the edit.
1117          *
1118          * This differs from Article::getContent() that when a missing revision is
1119          * encountered the result will be null and not the
1120          * 'missing-revision' message.
1121          *
1122          * @since 1.19
1123          * @param User $user The user to get the revision for
1124          * @return Content|null
1125          */
1126         private function getOriginalContent( User $user ) {
1127                 if ( $this->section == 'new' ) {
1128                         return $this->getCurrentContent();
1129                 }
1130                 $revision = $this->mArticle->getRevisionFetched();
1131                 if ( $revision === null ) {
1132                         if ( !$this->contentModel ) {
1133                                 $this->contentModel = $this->getTitle()->getContentModel();
1134                         }
1135                         $handler = ContentHandler::getForModelID( $this->contentModel );
1136
1137                         return $handler->makeEmptyContent();
1138                 }
1139                 $content = $revision->getContent( Revision::FOR_THIS_USER, $user );
1140                 return $content;
1141         }
1142
1143         /**
1144          * Get the current content of the page. This is basically similar to
1145          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
1146          * content object is returned instead of null.
1147          *
1148          * @since 1.21
1149          * @return Content
1150          */
1151         protected function getCurrentContent() {
1152                 $rev = $this->mArticle->getRevision();
1153                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
1154
1155                 if ( $content === false || $content === null ) {
1156                         if ( !$this->contentModel ) {
1157                                 $this->contentModel = $this->getTitle()->getContentModel();
1158                         }
1159                         $handler = ContentHandler::getForModelID( $this->contentModel );
1160
1161                         return $handler->makeEmptyContent();
1162                 } else {
1163                         # nasty side-effect, but needed for consistency
1164                         $this->contentModel = $rev->getContentModel();
1165                         $this->contentFormat = $rev->getContentFormat();
1166
1167                         return $content;
1168                 }
1169         }
1170
1171         /**
1172          * Use this method before edit() to preload some text into the edit box
1173          *
1174          * @param string $text
1175          * @deprecated since 1.21, use setPreloadedContent() instead.
1176          */
1177         public function setPreloadedText( $text ) {
1178                 ContentHandler::deprecated( __METHOD__, "1.21" );
1179
1180                 $content = $this->toEditContent( $text );
1181
1182                 $this->setPreloadedContent( $content );
1183         }
1184
1185         /**
1186          * Use this method before edit() to preload some content into the edit box
1187          *
1188          * @param Content $content
1189          *
1190          * @since 1.21
1191          */
1192         public function setPreloadedContent( Content $content ) {
1193                 $this->mPreloadContent = $content;
1194         }
1195
1196         /**
1197          * Get the contents to be preloaded into the box, either set by
1198          * an earlier setPreloadText() or by loading the given page.
1199          *
1200          * @param string $preload Representing the title to preload from.
1201          *
1202          * @return string
1203          *
1204          * @deprecated since 1.21, use getPreloadedContent() instead
1205          */
1206         protected function getPreloadedText( $preload ) {
1207                 ContentHandler::deprecated( __METHOD__, "1.21" );
1208
1209                 $content = $this->getPreloadedContent( $preload );
1210                 $text = $this->toEditText( $content );
1211
1212                 return $text;
1213         }
1214
1215         /**
1216          * Get the contents to be preloaded into the box, either set by
1217          * an earlier setPreloadText() or by loading the given page.
1218          *
1219          * @param string $preload Representing the title to preload from.
1220          * @param array $params Parameters to use (interface-message style) in the preloaded text
1221          *
1222          * @return Content
1223          *
1224          * @since 1.21
1225          */
1226         protected function getPreloadedContent( $preload, $params = array() ) {
1227                 global $wgUser;
1228
1229                 if ( !empty( $this->mPreloadContent ) ) {
1230                         return $this->mPreloadContent;
1231                 }
1232
1233                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1234
1235                 if ( $preload === '' ) {
1236                         return $handler->makeEmptyContent();
1237                 }
1238
1239                 $title = Title::newFromText( $preload );
1240                 # Check for existence to avoid getting MediaWiki:Noarticletext
1241                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1242                         //TODO: somehow show a warning to the user!
1243                         return $handler->makeEmptyContent();
1244                 }
1245
1246                 $page = WikiPage::factory( $title );
1247                 if ( $page->isRedirect() ) {
1248                         $title = $page->getRedirectTarget();
1249                         # Same as before
1250                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1251                                 //TODO: somehow show a warning to the user!
1252                                 return $handler->makeEmptyContent();
1253                         }
1254                         $page = WikiPage::factory( $title );
1255                 }
1256
1257                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1258                 $content = $page->getContent( Revision::RAW );
1259
1260                 if ( !$content ) {
1261                         //TODO: somehow show a warning to the user!
1262                         return $handler->makeEmptyContent();
1263                 }
1264
1265                 if ( $content->getModel() !== $handler->getModelID() ) {
1266                         $converted = $content->convert( $handler->getModelID() );
1267
1268                         if ( !$converted ) {
1269                                 //TODO: somehow show a warning to the user!
1270                                 wfDebug( "Attempt to preload incompatible content: "
1271                                                 . "can't convert " . $content->getModel()
1272                                                 . " to " . $handler->getModelID() );
1273
1274                                 return $handler->makeEmptyContent();
1275                         }
1276
1277                         $content = $converted;
1278                 }
1279
1280                 return $content->preloadTransform( $title, $parserOptions, $params );
1281         }
1282
1283         /**
1284          * Make sure the form isn't faking a user's credentials.
1285          *
1286          * @param WebRequest $request
1287          * @return bool
1288          * @private
1289          */
1290         function tokenOk( &$request ) {
1291                 global $wgUser;
1292                 $token = $request->getVal( 'wpEditToken' );
1293                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1294                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1295                 return $this->mTokenOk;
1296         }
1297
1298         /**
1299          * Sets post-edit cookie indicating the user just saved a particular revision.
1300          *
1301          * This uses a temporary cookie for each revision ID so separate saves will never
1302          * interfere with each other.
1303          *
1304          * The cookie is deleted in the mediawiki.action.view.postEdit JS module after
1305          * the redirect.  It must be clearable by JavaScript code, so it must not be
1306          * marked HttpOnly. The JavaScript code converts the cookie to a wgPostEdit config
1307          * variable.
1308          *
1309          * If the variable were set on the server, it would be cached, which is unwanted
1310          * since the post-edit state should only apply to the load right after the save.
1311          *
1312          * @param int $statusValue The status value (to check for new article status)
1313          */
1314         protected function setPostEditCookie( $statusValue ) {
1315                 $revisionId = $this->mArticle->getLatest();
1316                 $postEditKey = self::POST_EDIT_COOKIE_KEY_PREFIX . $revisionId;
1317
1318                 $val = 'saved';
1319                 if ( $statusValue == self::AS_SUCCESS_NEW_ARTICLE ) {
1320                         $val = 'created';
1321                 } elseif ( $this->oldid ) {
1322                         $val = 'restored';
1323                 }
1324
1325                 $response = RequestContext::getMain()->getRequest()->response();
1326                 $response->setcookie( $postEditKey, $val, time() + self::POST_EDIT_COOKIE_DURATION, array(
1327                         'httpOnly' => false,
1328                 ) );
1329         }
1330
1331         /**
1332          * Attempt submission
1333          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1334          * @return bool False if output is done, true if the rest of the form should be displayed
1335          */
1336         public function attemptSave() {
1337                 global $wgUser;
1338
1339                 $resultDetails = false;
1340                 # Allow bots to exempt some edits from bot flagging
1341                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1342                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1343
1344                 return $this->handleStatus( $status, $resultDetails );
1345         }
1346
1347         /**
1348          * Handle status, such as after attempt save
1349          *
1350          * @param Status $status
1351          * @param array|bool $resultDetails
1352          *
1353          * @throws ErrorPageError
1354          * @return bool False, if output is done, true if rest of the form should be displayed
1355          */
1356         private function handleStatus( Status $status, $resultDetails ) {
1357                 global $wgUser, $wgOut;
1358
1359                 /**
1360                  * @todo FIXME: once the interface for internalAttemptSave() is made
1361                  *   nicer, this should use the message in $status
1362                  */
1363                 if ( $status->value == self::AS_SUCCESS_UPDATE
1364                         || $status->value == self::AS_SUCCESS_NEW_ARTICLE
1365                 ) {
1366                         $this->didSave = true;
1367                         if ( !$resultDetails['nullEdit'] ) {
1368                                 $this->setPostEditCookie( $status->value );
1369                         }
1370                 }
1371
1372                 switch ( $status->value ) {
1373                         case self::AS_HOOK_ERROR_EXPECTED:
1374                         case self::AS_CONTENT_TOO_BIG:
1375                         case self::AS_ARTICLE_WAS_DELETED:
1376                         case self::AS_CONFLICT_DETECTED:
1377                         case self::AS_SUMMARY_NEEDED:
1378                         case self::AS_TEXTBOX_EMPTY:
1379                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1380                         case self::AS_END:
1381                         case self::AS_BLANK_ARTICLE:
1382                                 return true;
1383
1384                         case self::AS_HOOK_ERROR:
1385                                 return false;
1386
1387                         case self::AS_PARSE_ERROR:
1388                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>' );
1389                                 return true;
1390
1391                         case self::AS_SUCCESS_NEW_ARTICLE:
1392                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1393                                 $anchor = isset( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1394                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1395                                 return false;
1396
1397                         case self::AS_SUCCESS_UPDATE:
1398                                 $extraQuery = '';
1399                                 $sectionanchor = $resultDetails['sectionanchor'];
1400
1401                                 // Give extensions a chance to modify URL query on update
1402                                 wfRunHooks(
1403                                         'ArticleUpdateBeforeRedirect',
1404                                         array( $this->mArticle, &$sectionanchor, &$extraQuery )
1405                                 );
1406
1407                                 if ( $resultDetails['redirect'] ) {
1408                                         if ( $extraQuery == '' ) {
1409                                                 $extraQuery = 'redirect=no';
1410                                         } else {
1411                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1412                                         }
1413                                 }
1414                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1415                                 return false;
1416
1417                         case self::AS_SPAM_ERROR:
1418                                 $this->spamPageWithContent( $resultDetails['spam'] );
1419                                 return false;
1420
1421                         case self::AS_BLOCKED_PAGE_FOR_USER:
1422                                 throw new UserBlockedError( $wgUser->getBlock() );
1423
1424                         case self::AS_IMAGE_REDIRECT_ANON:
1425                         case self::AS_IMAGE_REDIRECT_LOGGED:
1426                                 throw new PermissionsError( 'upload' );
1427
1428                         case self::AS_READ_ONLY_PAGE_ANON:
1429                         case self::AS_READ_ONLY_PAGE_LOGGED:
1430                                 throw new PermissionsError( 'edit' );
1431
1432                         case self::AS_READ_ONLY_PAGE:
1433                                 throw new ReadOnlyError;
1434
1435                         case self::AS_RATE_LIMITED:
1436                                 throw new ThrottledError();
1437
1438                         case self::AS_NO_CREATE_PERMISSION:
1439                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1440                                 throw new PermissionsError( $permission );
1441
1442                         default:
1443                                 // We don't recognize $status->value. The only way that can happen
1444                                 // is if an extension hook aborted from inside ArticleSave.
1445                                 // Render the status object into $this->hookError
1446                                 // FIXME this sucks, we should just use the Status object throughout
1447                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1448                                         '</div>';
1449                                 return true;
1450                 }
1451         }
1452
1453         /**
1454          * Run hooks that can filter edits just before they get saved.
1455          *
1456          * @param Content $content The Content to filter.
1457          * @param Status $status For reporting the outcome to the caller
1458          * @param User $user The user performing the edit
1459          *
1460          * @return bool
1461          */
1462         protected function runPostMergeFilters( Content $content, Status $status, User $user ) {
1463                 // Run old style post-section-merge edit filter
1464                 if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged',
1465                         array( $this, $content, &$this->hookError, $this->summary ) ) ) {
1466
1467                         # Error messages etc. could be handled within the hook...
1468                         $status->fatal( 'hookaborted' );
1469                         $status->value = self::AS_HOOK_ERROR;
1470                         return false;
1471                 } elseif ( $this->hookError != '' ) {
1472                         # ...or the hook could be expecting us to produce an error
1473                         $status->fatal( 'hookaborted' );
1474                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1475                         return false;
1476                 }
1477
1478                 // Run new style post-section-merge edit filter
1479                 if ( !wfRunHooks( 'EditFilterMergedContent',
1480                         array( $this->mArticle->getContext(), $content, $status, $this->summary,
1481                                 $user, $this->minoredit ) ) ) {
1482
1483                         # Error messages etc. could be handled within the hook...
1484                         // XXX: $status->value may already be something informative...
1485                         $this->hookError = $status->getWikiText();
1486                         $status->fatal( 'hookaborted' );
1487                         $status->value = self::AS_HOOK_ERROR;
1488                         return false;
1489                 } elseif ( !$status->isOK() ) {
1490                         # ...or the hook could be expecting us to produce an error
1491                         // FIXME this sucks, we should just use the Status object throughout
1492                         $this->hookError = $status->getWikiText();
1493                         $status->fatal( 'hookaborted' );
1494                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1495                         return false;
1496                 }
1497
1498                 return true;
1499         }
1500
1501         /**
1502          * Return the summary to be used for a new section.
1503          *
1504          * @param string $sectionanchor Set to the section anchor text
1505          * @return string
1506          */
1507         private function newSectionSummary( &$sectionanchor = null ) {
1508                 global $wgParser;
1509
1510                 if ( $this->sectiontitle !== '' ) {
1511                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1512                         // If no edit summary was specified, create one automatically from the section
1513                         // title and have it link to the new section. Otherwise, respect the summary as
1514                         // passed.
1515                         if ( $this->summary === '' ) {
1516                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1517                                 return wfMessage( 'newsectionsummary' )
1518                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1519                         }
1520                 } elseif ( $this->summary !== '' ) {
1521                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1522                         # This is a new section, so create a link to the new section
1523                         # in the revision summary.
1524                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1525                         return wfMessage( 'newsectionsummary' )
1526                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1527                 } else {
1528                         return $this->summary;
1529                 }
1530         }
1531
1532         /**
1533          * Attempt submission (no UI)
1534          *
1535          * @param array $result Array to add statuses to, currently with the
1536          *   possible keys:
1537          *   - spam (string): Spam string from content if any spam is detected by
1538          *     matchSpamRegex.
1539          *   - sectionanchor (string): Section anchor for a section save.
1540          *   - nullEdit (boolean): Set if doEditContent is OK.  True if null edit,
1541          *     false otherwise.
1542          *   - redirect (bool): Set if doEditContent is OK. True if resulting
1543          *     revision is a redirect.
1544          * @param bool $bot True if edit is being made under the bot right.
1545          *
1546          * @return Status Status object, possibly with a message, but always with
1547          *   one of the AS_* constants in $status->value,
1548          *
1549          * @todo FIXME: This interface is TERRIBLE, but hard to get rid of due to
1550          *   various error display idiosyncrasies. There are also lots of cases
1551          *   where error metadata is set in the object and retrieved later instead
1552          *   of being returned, e.g. AS_CONTENT_TOO_BIG and
1553          *   AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some
1554          * time.
1555          */
1556         function internalAttemptSave( &$result, $bot = false ) {
1557                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1558
1559                 $status = Status::newGood();
1560
1561                 wfProfileIn( __METHOD__ );
1562                 wfProfileIn( __METHOD__ . '-checks' );
1563
1564                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1565                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1566                         $status->fatal( 'hookaborted' );
1567                         $status->value = self::AS_HOOK_ERROR;
1568                         wfProfileOut( __METHOD__ . '-checks' );
1569                         wfProfileOut( __METHOD__ );
1570                         return $status;
1571                 }
1572
1573                 $spam = $wgRequest->getText( 'wpAntispam' );
1574                 if ( $spam !== '' ) {
1575                         wfDebugLog(
1576                                 'SimpleAntiSpam',
1577                                 $wgUser->getName() .
1578                                 ' editing "' .
1579                                 $this->mTitle->getPrefixedText() .
1580                                 '" submitted bogus field "' .
1581                                 $spam .
1582                                 '"'
1583                         );
1584                         $status->fatal( 'spamprotectionmatch', false );
1585                         $status->value = self::AS_SPAM_ERROR;
1586                         wfProfileOut( __METHOD__ . '-checks' );
1587                         wfProfileOut( __METHOD__ );
1588                         return $status;
1589                 }
1590
1591                 try {
1592                         # Construct Content object
1593                         $textbox_content = $this->toEditContent( $this->textbox1 );
1594                 } catch ( MWContentSerializationException $ex ) {
1595                         $status->fatal(
1596                                 'content-failed-to-parse',
1597                                 $this->contentModel,
1598                                 $this->contentFormat,
1599                                 $ex->getMessage()
1600                         );
1601                         $status->value = self::AS_PARSE_ERROR;
1602                         wfProfileOut( __METHOD__ . '-checks' );
1603                         wfProfileOut( __METHOD__ );
1604                         return $status;
1605                 }
1606
1607                 # Check image redirect
1608                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1609                         $textbox_content->isRedirect() &&
1610                         !$wgUser->isAllowed( 'upload' )
1611                 ) {
1612                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1613                                 $status->setResult( false, $code );
1614
1615                                 wfProfileOut( __METHOD__ . '-checks' );
1616                                 wfProfileOut( __METHOD__ );
1617
1618                                 return $status;
1619                 }
1620
1621                 # Check for spam
1622                 $match = self::matchSummarySpamRegex( $this->summary );
1623                 if ( $match === false && $this->section == 'new' ) {
1624                         # $wgSpamRegex is enforced on this new heading/summary because, unlike
1625                         # regular summaries, it is added to the actual wikitext.
1626                         if ( $this->sectiontitle !== '' ) {
1627                                 # This branch is taken when the API is used with the 'sectiontitle' parameter.
1628                                 $match = self::matchSpamRegex( $this->sectiontitle );
1629                         } else {
1630                                 # This branch is taken when the "Add Topic" user interface is used, or the API
1631                                 # is used with the 'summary' parameter.
1632                                 $match = self::matchSpamRegex( $this->summary );
1633                         }
1634                 }
1635                 if ( $match === false ) {
1636                         $match = self::matchSpamRegex( $this->textbox1 );
1637                 }
1638                 if ( $match !== false ) {
1639                         $result['spam'] = $match;
1640                         $ip = $wgRequest->getIP();
1641                         $pdbk = $this->mTitle->getPrefixedDBkey();
1642                         $match = str_replace( "\n", '', $match );
1643                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1644                         $status->fatal( 'spamprotectionmatch', $match );
1645                         $status->value = self::AS_SPAM_ERROR;
1646                         wfProfileOut( __METHOD__ . '-checks' );
1647                         wfProfileOut( __METHOD__ );
1648                         return $status;
1649                 }
1650                 if ( !wfRunHooks(
1651                         'EditFilter',
1652                         array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) )
1653                 ) {
1654                         # Error messages etc. could be handled within the hook...
1655                         $status->fatal( 'hookaborted' );
1656                         $status->value = self::AS_HOOK_ERROR;
1657                         wfProfileOut( __METHOD__ . '-checks' );
1658                         wfProfileOut( __METHOD__ );
1659                         return $status;
1660                 } elseif ( $this->hookError != '' ) {
1661                         # ...or the hook could be expecting us to produce an error
1662                         $status->fatal( 'hookaborted' );
1663                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1664                         wfProfileOut( __METHOD__ . '-checks' );
1665                         wfProfileOut( __METHOD__ );
1666                         return $status;
1667                 }
1668
1669                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1670                         // Auto-block user's IP if the account was "hard" blocked
1671                         $wgUser->spreadAnyEditBlock();
1672                         # Check block state against master, thus 'false'.
1673                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1674                         wfProfileOut( __METHOD__ . '-checks' );
1675                         wfProfileOut( __METHOD__ );
1676                         return $status;
1677                 }
1678
1679                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1680                 if ( $this->kblength > $wgMaxArticleSize ) {
1681                         // Error will be displayed by showEditForm()
1682                         $this->tooBig = true;
1683                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1684                         wfProfileOut( __METHOD__ . '-checks' );
1685                         wfProfileOut( __METHOD__ );
1686                         return $status;
1687                 }
1688
1689                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1690                         if ( $wgUser->isAnon() ) {
1691                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1692                                 wfProfileOut( __METHOD__ . '-checks' );
1693                                 wfProfileOut( __METHOD__ );
1694                                 return $status;
1695                         } else {
1696                                 $status->fatal( 'readonlytext' );
1697                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1698                                 wfProfileOut( __METHOD__ . '-checks' );
1699                                 wfProfileOut( __METHOD__ );
1700                                 return $status;
1701                         }
1702                 }
1703
1704                 if ( wfReadOnly() ) {
1705                         $status->fatal( 'readonlytext' );
1706                         $status->value = self::AS_READ_ONLY_PAGE;
1707                         wfProfileOut( __METHOD__ . '-checks' );
1708                         wfProfileOut( __METHOD__ );
1709                         return $status;
1710                 }
1711                 if ( $wgUser->pingLimiter() || $wgUser->pingLimiter( 'linkpurge', 0 ) ) {
1712                         $status->fatal( 'actionthrottledtext' );
1713                         $status->value = self::AS_RATE_LIMITED;
1714                         wfProfileOut( __METHOD__ . '-checks' );
1715                         wfProfileOut( __METHOD__ );
1716                         return $status;
1717                 }
1718
1719                 # If the article has been deleted while editing, don't save it without
1720                 # confirmation
1721                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1722                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1723                         wfProfileOut( __METHOD__ . '-checks' );
1724                         wfProfileOut( __METHOD__ );
1725                         return $status;
1726                 }
1727
1728                 wfProfileOut( __METHOD__ . '-checks' );
1729
1730                 # Load the page data from the master. If anything changes in the meantime,
1731                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1732                 $this->mArticle->loadPageData( 'fromdbmaster' );
1733                 $new = !$this->mArticle->exists();
1734
1735                 if ( $new ) {
1736                         // Late check for create permission, just in case *PARANOIA*
1737                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1738                                 $status->fatal( 'nocreatetext' );
1739                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1740                                 wfDebug( __METHOD__ . ": no create permission\n" );
1741                                 wfProfileOut( __METHOD__ );
1742                                 return $status;
1743                         }
1744
1745                         // Don't save a new page if it's blank or if it's a MediaWiki:
1746                         // message with content equivalent to default (allow empty pages
1747                         // in this case to disable messages, see bug 50124)
1748                         $defaultMessageText = $this->mTitle->getDefaultMessageText();
1749                         if ( $this->mTitle->getNamespace() === NS_MEDIAWIKI && $defaultMessageText !== false ) {
1750                                 $defaultText = $defaultMessageText;
1751                         } else {
1752                                 $defaultText = '';
1753                         }
1754
1755                         if ( !$this->allowBlankArticle && $this->textbox1 === $defaultText ) {
1756                                 $this->blankArticle = true;
1757                                 $status->fatal( 'blankarticle' );
1758                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1759                                 wfProfileOut( __METHOD__ );
1760                                 return $status;
1761                         }
1762
1763                         if ( !$this->runPostMergeFilters( $textbox_content, $status, $wgUser ) ) {
1764                                 wfProfileOut( __METHOD__ );
1765                                 return $status;
1766                         }
1767
1768                         $content = $textbox_content;
1769
1770                         $result['sectionanchor'] = '';
1771                         if ( $this->section == 'new' ) {
1772                                 if ( $this->sectiontitle !== '' ) {
1773                                         // Insert the section title above the content.
1774                                         $content = $content->addSectionHeader( $this->sectiontitle );
1775                                 } elseif ( $this->summary !== '' ) {
1776                                         // Insert the section title above the content.
1777                                         $content = $content->addSectionHeader( $this->summary );
1778                                 }
1779                                 $this->summary = $this->newSectionSummary( $result['sectionanchor'] );
1780                         }
1781
1782                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1783
1784                 } else { # not $new
1785
1786                         # Article exists. Check for edit conflict.
1787
1788                         $this->mArticle->clear(); # Force reload of dates, etc.
1789                         $timestamp = $this->mArticle->getTimestamp();
1790
1791                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1792
1793                         if ( $timestamp != $this->edittime ) {
1794                                 $this->isConflict = true;
1795                                 if ( $this->section == 'new' ) {
1796                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1797                                                 $this->mArticle->getComment() == $this->newSectionSummary()
1798                                         ) {
1799                                                 // Probably a duplicate submission of a new comment.
1800                                                 // This can happen when squid resends a request after
1801                                                 // a timeout but the first one actually went through.
1802                                                 wfDebug( __METHOD__
1803                                                         . ": duplicate new section submission; trigger edit conflict!\n" );
1804                                         } else {
1805                                                 // New comment; suppress conflict.
1806                                                 $this->isConflict = false;
1807                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1808                                         }
1809                                 } elseif ( $this->section == ''
1810                                         && Revision::userWasLastToEdit(
1811                                                 DB_MASTER, $this->mTitle->getArticleID(),
1812                                                 $wgUser->getId(), $this->edittime
1813                                         )
1814                                 ) {
1815                                         # Suppress edit conflict with self, except for section edits where merging is required.
1816                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1817                                         $this->isConflict = false;
1818                                 }
1819                         }
1820
1821                         // If sectiontitle is set, use it, otherwise use the summary as the section title.
1822                         if ( $this->sectiontitle !== '' ) {
1823                                 $sectionTitle = $this->sectiontitle;
1824                         } else {
1825                                 $sectionTitle = $this->summary;
1826                         }
1827
1828                         $content = null;
1829
1830                         if ( $this->isConflict ) {
1831                                 wfDebug( __METHOD__
1832                                         . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1833                                         . " (article time '{$timestamp}')\n" );
1834
1835                                 $content = $this->mArticle->replaceSectionContent(
1836                                         $this->section,
1837                                         $textbox_content,
1838                                         $sectionTitle,
1839                                         $this->edittime
1840                                 );
1841                         } else {
1842                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1843                                 $content = $this->mArticle->replaceSectionContent(
1844                                         $this->section,
1845                                         $textbox_content,
1846                                         $sectionTitle
1847                                 );
1848                         }
1849
1850                         if ( is_null( $content ) ) {
1851                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1852                                 $this->isConflict = true;
1853                                 $content = $textbox_content; // do not try to merge here!
1854                         } elseif ( $this->isConflict ) {
1855                                 # Attempt merge
1856                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1857                                         // Successful merge! Maybe we should tell the user the good news?
1858                                         $this->isConflict = false;
1859                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1860                                 } else {
1861                                         $this->section = '';
1862                                         $this->textbox1 = ContentHandler::getContentText( $content );
1863                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1864                                 }
1865                         }
1866
1867                         if ( $this->isConflict ) {
1868                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1869                                 wfProfileOut( __METHOD__ );
1870                                 return $status;
1871                         }
1872
1873                         if ( !$this->runPostMergeFilters( $content, $status, $wgUser ) ) {
1874                                 wfProfileOut( __METHOD__ );
1875                                 return $status;
1876                         }
1877
1878                         if ( $this->section == 'new' ) {
1879                                 // Handle the user preference to force summaries here
1880                                 if ( !$this->allowBlankSummary && trim( $this->summary ) == '' ) {
1881                                         $this->missingSummary = true;
1882                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1883                                         $status->value = self::AS_SUMMARY_NEEDED;
1884                                         wfProfileOut( __METHOD__ );
1885                                         return $status;
1886                                 }
1887
1888                                 // Do not allow the user to post an empty comment
1889                                 if ( $this->textbox1 == '' ) {
1890                                         $this->missingComment = true;
1891                                         $status->fatal( 'missingcommenttext' );
1892                                         $status->value = self::AS_TEXTBOX_EMPTY;
1893                                         wfProfileOut( __METHOD__ );
1894                                         return $status;
1895                                 }
1896                         } elseif ( !$this->allowBlankSummary
1897                                 && !$content->equals( $this->getOriginalContent( $wgUser ) )
1898                                 && !$content->isRedirect()
1899                                 && md5( $this->summary ) == $this->autoSumm
1900                         ) {
1901                                 $this->missingSummary = true;
1902                                 $status->fatal( 'missingsummary' );
1903                                 $status->value = self::AS_SUMMARY_NEEDED;
1904                                 wfProfileOut( __METHOD__ );
1905                                 return $status;
1906                         }
1907
1908                         # All's well
1909                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1910                         $sectionanchor = '';
1911                         if ( $this->section == 'new' ) {
1912                                 $this->summary = $this->newSectionSummary( $sectionanchor );
1913                         } elseif ( $this->section != '' ) {
1914                                 # Try to get a section anchor from the section source, redirect
1915                                 # to edited section if header found.
1916                                 # XXX: Might be better to integrate this into Article::replaceSection
1917                                 # for duplicate heading checking and maybe parsing.
1918                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1919                                 # We can't deal with anchors, includes, html etc in the header for now,
1920                                 # headline would need to be parsed to improve this.
1921                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1922                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1923                                 }
1924                         }
1925                         $result['sectionanchor'] = $sectionanchor;
1926                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1927
1928                         // Save errors may fall down to the edit form, but we've now
1929                         // merged the section into full text. Clear the section field
1930                         // so that later submission of conflict forms won't try to
1931                         // replace that into a duplicated mess.
1932                         $this->textbox1 = $this->toEditText( $content );
1933                         $this->section = '';
1934
1935                         $status->value = self::AS_SUCCESS_UPDATE;
1936                 }
1937
1938                 // Check for length errors again now that the section is merged in
1939                 $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1940                 if ( $this->kblength > $wgMaxArticleSize ) {
1941                         $this->tooBig = true;
1942                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1943                         wfProfileOut( __METHOD__ );
1944                         return $status;
1945                 }
1946
1947                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1948                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1949                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1950                         ( $bot ? EDIT_FORCE_BOT : 0 );
1951
1952                 $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags,
1953                                                                                                                 false, null, $this->contentFormat );
1954
1955                 if ( !$doEditStatus->isOK() ) {
1956                         // Failure from doEdit()
1957                         // Show the edit conflict page for certain recognized errors from doEdit(),
1958                         // but don't show it for errors from extension hooks
1959                         $errors = $doEditStatus->getErrorsArray();
1960                         if ( in_array( $errors[0][0],
1961                                         array( 'edit-gone-missing', 'edit-conflict', 'edit-already-exists' ) )
1962                         ) {
1963                                 $this->isConflict = true;
1964                                 // Destroys data doEdit() put in $status->value but who cares
1965                                 $doEditStatus->value = self::AS_END;
1966                         }
1967                         wfProfileOut( __METHOD__ );
1968                         return $doEditStatus;
1969                 }
1970
1971                 $result['nullEdit'] = $doEditStatus->hasMessage( 'edit-no-change' );
1972                 if ( $result['nullEdit'] ) {
1973                         // We don't know if it was a null edit until now, so increment here
1974                         $wgUser->pingLimiter( 'linkpurge' );
1975                 }
1976                 $result['redirect'] = $content->isRedirect();
1977                 $this->updateWatchlist();
1978                 wfProfileOut( __METHOD__ );
1979                 return $status;
1980         }
1981
1982         /**
1983          * Register the change of watch status
1984          */
1985         protected function updateWatchlist() {
1986                 global $wgUser;
1987
1988                 if ( $wgUser->isLoggedIn()
1989                         && $this->watchthis != $wgUser->isWatched( $this->mTitle, WatchedItem::IGNORE_USER_RIGHTS )
1990                 ) {
1991                         $fname = __METHOD__;
1992                         $title = $this->mTitle;
1993                         $watch = $this->watchthis;
1994
1995                         // Do this in its own transaction to reduce contention...
1996                         $dbw = wfGetDB( DB_MASTER );
1997                         $dbw->onTransactionIdle( function () use ( $dbw, $title, $watch, $wgUser, $fname ) {
1998                                 $dbw->begin( $fname );
1999                                 WatchAction::doWatchOrUnwatch( $watch, $title, $wgUser );
2000                                 $dbw->commit( $fname );
2001                         } );
2002                 }
2003         }
2004
2005         /**
2006          * Attempts to merge text content with base and current revisions
2007          *
2008          * @param string $editText
2009          *
2010          * @return bool
2011          * @deprecated since 1.21, use mergeChangesIntoContent() instead
2012          */
2013         function mergeChangesInto( &$editText ) {
2014                 ContentHandler::deprecated( __METHOD__, "1.21" );
2015
2016                 $editContent = $this->toEditContent( $editText );
2017
2018                 $ok = $this->mergeChangesIntoContent( $editContent );
2019
2020                 if ( $ok ) {
2021                         $editText = $this->toEditText( $editContent );
2022                         return true;
2023                 }
2024                 return false;
2025         }
2026
2027         /**
2028          * Attempts to do 3-way merge of edit content with a base revision
2029          * and current content, in case of edit conflict, in whichever way appropriate
2030          * for the content type.
2031          *
2032          * @since 1.21
2033          *
2034          * @param Content $editContent
2035          *
2036          * @return bool
2037          */
2038         private function mergeChangesIntoContent( &$editContent ) {
2039                 wfProfileIn( __METHOD__ );
2040
2041                 $db = wfGetDB( DB_MASTER );
2042
2043                 // This is the revision the editor started from
2044                 $baseRevision = $this->getBaseRevision();
2045                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
2046
2047                 if ( is_null( $baseContent ) ) {
2048                         wfProfileOut( __METHOD__ );
2049                         return false;
2050                 }
2051
2052                 // The current state, we want to merge updates into it
2053                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2054                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
2055
2056                 if ( is_null( $currentContent ) ) {
2057                         wfProfileOut( __METHOD__ );
2058                         return false;
2059                 }
2060
2061                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
2062
2063                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
2064
2065                 if ( $result ) {
2066                         $editContent = $result;
2067                         wfProfileOut( __METHOD__ );
2068                         return true;
2069                 }
2070
2071                 wfProfileOut( __METHOD__ );
2072                 return false;
2073         }
2074
2075         /**
2076          * @return Revision
2077          */
2078         function getBaseRevision() {
2079                 if ( !$this->mBaseRevision ) {
2080                         $db = wfGetDB( DB_MASTER );
2081                         $this->mBaseRevision = Revision::loadFromTimestamp(
2082                                 $db, $this->mTitle, $this->edittime );
2083                 }
2084                 return $this->mBaseRevision;
2085         }
2086
2087         /**
2088          * Check given input text against $wgSpamRegex, and return the text of the first match.
2089          *
2090          * @param string $text
2091          *
2092          * @return string|bool Matching string or false
2093          */
2094         public static function matchSpamRegex( $text ) {
2095                 global $wgSpamRegex;
2096                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
2097                 $regexes = (array)$wgSpamRegex;
2098                 return self::matchSpamRegexInternal( $text, $regexes );
2099         }
2100
2101         /**
2102          * Check given input text against $wgSummarySpamRegex, and return the text of the first match.
2103          *
2104          * @param string $text
2105          *
2106          * @return string|bool Matching string or false
2107          */
2108         public static function matchSummarySpamRegex( $text ) {
2109                 global $wgSummarySpamRegex;
2110                 $regexes = (array)$wgSummarySpamRegex;
2111                 return self::matchSpamRegexInternal( $text, $regexes );
2112         }
2113
2114         /**
2115          * @param string $text
2116          * @param array $regexes
2117          * @return bool|string
2118          */
2119         protected static function matchSpamRegexInternal( $text, $regexes ) {
2120                 foreach ( $regexes as $regex ) {
2121                         $matches = array();
2122                         if ( preg_match( $regex, $text, $matches ) ) {
2123                                 return $matches[0];
2124                         }
2125                 }
2126                 return false;
2127         }
2128
2129         function setHeaders() {
2130                 global $wgOut, $wgUser;
2131
2132                 $wgOut->addModules( 'mediawiki.action.edit' );
2133                 $wgOut->addModuleStyles( 'mediawiki.action.edit.styles' );
2134
2135                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
2136                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
2137                 }
2138
2139                 if ( $wgUser->getOption( 'useeditwarning', false ) ) {
2140                         $wgOut->addModules( 'mediawiki.action.edit.editWarning' );
2141                 }
2142
2143                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2144
2145                 # Enabled article-related sidebar, toplinks, etc.
2146                 $wgOut->setArticleRelated( true );
2147
2148                 $contextTitle = $this->getContextTitle();
2149                 if ( $this->isConflict ) {
2150                         $msg = 'editconflict';
2151                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
2152                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
2153                 } else {
2154                         $msg = $contextTitle->exists()
2155                                 || ( $contextTitle->getNamespace() == NS_MEDIAWIKI
2156                                         && $contextTitle->getDefaultMessageText() !== false
2157                                 )
2158                                 ? 'editing'
2159                                 : 'creating';
2160                 }
2161
2162                 # Use the title defined by DISPLAYTITLE magic word when present
2163                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
2164                 if ( $displayTitle === false ) {
2165                         $displayTitle = $contextTitle->getPrefixedText();
2166                 }
2167                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
2168         }
2169
2170         /**
2171          * Show all applicable editing introductions
2172          */
2173         protected function showIntro() {
2174                 global $wgOut, $wgUser;
2175                 if ( $this->suppressIntro ) {
2176                         return;
2177                 }
2178
2179                 $namespace = $this->mTitle->getNamespace();
2180
2181                 if ( $namespace == NS_MEDIAWIKI ) {
2182                         # Show a warning if editing an interface message
2183                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
2184                 } elseif ( $namespace == NS_FILE ) {
2185                         # Show a hint to shared repo
2186                         $file = wfFindFile( $this->mTitle );
2187                         if ( $file && !$file->isLocal() ) {
2188                                 $descUrl = $file->getDescriptionUrl();
2189                                 # there must be a description url to show a hint to shared repo
2190                                 if ( $descUrl ) {
2191                                         if ( !$this->mTitle->exists() ) {
2192                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array(
2193                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
2194                                                 ) );
2195                                         } else {
2196                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
2197                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
2198                                                 ) );
2199                                         }
2200                                 }
2201                         }
2202                 }
2203
2204                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
2205                 # Show log extract when the user is currently blocked
2206                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
2207                         $parts = explode( '/', $this->mTitle->getText(), 2 );
2208                         $username = $parts[0];
2209                         $user = User::newFromName( $username, false /* allow IP users*/ );
2210                         $ip = User::isIP( $username );
2211                         $block = Block::newFromTarget( $user, $user );
2212                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
2213                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
2214                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
2215                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) { # Show log extract if the user is currently blocked
2216                                 LogEventsList::showLogExtract(
2217                                         $wgOut,
2218                                         'block',
2219                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
2220                                         '',
2221                                         array(
2222                                                 'lim' => 1,
2223                                                 'showIfEmpty' => false,
2224                                                 'msgKey' => array(
2225                                                         'blocked-notice-logextract',
2226                                                         $user->getName() # Support GENDER in notice
2227                                                 )
2228                                         )
2229                                 );
2230                         }
2231                 }
2232                 # Try to add a custom edit intro, or use the standard one if this is not possible.
2233                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
2234                         $helpLink = wfExpandUrl( Skin::makeInternalOrExternalUrl(
2235                                 wfMessage( 'helppage' )->inContentLanguage()->text()
2236                         ) );
2237                         if ( $wgUser->isLoggedIn() ) {
2238                                 $wgOut->wrapWikiMsg(
2239                                         // Suppress the external link icon, consider the help url an internal one
2240                                         "<div class=\"mw-newarticletext plainlinks\">\n$1\n</div>",
2241                                         array(
2242                                                 'newarticletext',
2243                                                 $helpLink
2244                                         )
2245                                 );
2246                         } else {
2247                                 $wgOut->wrapWikiMsg(
2248                                         // Suppress the external link icon, consider the help url an internal one
2249                                         "<div class=\"mw-newarticletextanon plainlinks\">\n$1\n</div>",
2250                                         array(
2251                                                 'newarticletextanon',
2252                                                 $helpLink
2253                                         )
2254                                 );
2255                         }
2256                 }
2257                 # Give a notice if the user is editing a deleted/moved page...
2258                 if ( !$this->mTitle->exists() ) {
2259                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
2260                                 '',
2261                                 array(
2262                                         'lim' => 10,
2263                                         'conds' => array( "log_action != 'revision'" ),
2264                                         'showIfEmpty' => false,
2265                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
2266                                 )
2267                         );
2268                 }
2269         }
2270
2271         /**
2272          * Attempt to show a custom editing introduction, if supplied
2273          *
2274          * @return bool
2275          */
2276         protected function showCustomIntro() {
2277                 if ( $this->editintro ) {
2278                         $title = Title::newFromText( $this->editintro );
2279                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
2280                                 global $wgOut;
2281                                 // Added using template syntax, to take <noinclude>'s into account.
2282                                 $wgOut->addWikiTextTitleTidy( '<div class="mw-editintro">{{:' . $title->getFullText() . '}}</div>', $this->mTitle );
2283                                 return true;
2284                         }
2285                 }
2286                 return false;
2287         }
2288
2289         /**
2290          * Gets an editable textual representation of $content.
2291          * The textual representation can be turned by into a Content object by the
2292          * toEditContent() method.
2293          *
2294          * If $content is null or false or a string, $content is returned unchanged.
2295          *
2296          * If the given Content object is not of a type that can be edited using
2297          * the text base EditPage, an exception will be raised. Set
2298          * $this->allowNonTextContent to true to allow editing of non-textual
2299          * content.
2300          *
2301          * @param Content|null|bool|string $content
2302          * @return string The editable text form of the content.
2303          *
2304          * @throws MWException If $content is not an instance of TextContent and
2305          *   $this->allowNonTextContent is not true.
2306          */
2307         protected function toEditText( $content ) {
2308                 if ( $content === null || $content === false ) {
2309                         return $content;
2310                 }
2311
2312                 if ( is_string( $content ) ) {
2313                         return $content;
2314                 }
2315
2316                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2317                         throw new MWException( 'This content model is not supported: '
2318                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2319                 }
2320
2321                 return $content->serialize( $this->contentFormat );
2322         }
2323
2324         /**
2325          * Turns the given text into a Content object by unserializing it.
2326          *
2327          * If the resulting Content object is not of a type that can be edited using
2328          * the text base EditPage, an exception will be raised. Set
2329          * $this->allowNonTextContent to true to allow editing of non-textual
2330          * content.
2331          *
2332          * @param string|null|bool $text Text to unserialize
2333          * @return Content The content object created from $text. If $text was false
2334          *   or null, false resp. null will be  returned instead.
2335          *
2336          * @throws MWException If unserializing the text results in a Content
2337          *   object that is not an instance of TextContent and
2338          *   $this->allowNonTextContent is not true.
2339          */
2340         protected function toEditContent( $text ) {
2341                 if ( $text === false || $text === null ) {
2342                         return $text;
2343                 }
2344
2345                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
2346                         $this->contentModel, $this->contentFormat );
2347
2348                 if ( !$this->isSupportedContentModel( $content->getModel() ) ) {
2349                         throw new MWException( 'This content model is not supported: '
2350                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
2351                 }
2352
2353                 return $content;
2354         }
2355
2356         /**
2357          * Send the edit form and related headers to $wgOut
2358          * @param callable|null $formCallback That takes an OutputPage parameter; will be called
2359          *     during form output near the top, for captchas and the like.
2360          */
2361         function showEditForm( $formCallback = null ) {
2362                 global $wgOut, $wgUser;
2363
2364                 wfProfileIn( __METHOD__ );
2365
2366                 # need to parse the preview early so that we know which templates are used,
2367                 # otherwise users with "show preview after edit box" will get a blank list
2368                 # we parse this near the beginning so that setHeaders can do the title
2369                 # setting work instead of leaving it in getPreviewText
2370                 $previewOutput = '';
2371                 if ( $this->formtype == 'preview' ) {
2372                         $previewOutput = $this->getPreviewText();
2373                 }
2374
2375                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2376
2377                 $this->setHeaders();
2378
2379                 if ( $this->showHeader() === false ) {
2380                         wfProfileOut( __METHOD__ );
2381                         return;
2382                 }
2383
2384                 $wgOut->addHTML( $this->editFormPageTop );
2385
2386                 if ( $wgUser->getOption( 'previewontop' ) ) {
2387                         $this->displayPreviewArea( $previewOutput, true );
2388                 }
2389
2390                 $wgOut->addHTML( $this->editFormTextTop );
2391
2392                 $showToolbar = true;
2393                 if ( $this->wasDeletedSinceLastEdit() ) {
2394                         if ( $this->formtype == 'save' ) {
2395                                 // Hide the toolbar and edit area, user can click preview to get it back
2396                                 // Add an confirmation checkbox and explanation.
2397                                 $showToolbar = false;
2398                         } else {
2399                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2400                                         'deletedwhileediting' );
2401                         }
2402                 }
2403
2404                 // @todo add EditForm plugin interface and use it here!
2405                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2406                 $wgOut->addHTML( Html::openElement(
2407                         'form',
2408                         array(
2409                                 'id' => self::EDITFORM_ID,
2410                                 'name' => self::EDITFORM_ID,
2411                                 'method' => 'post',
2412                                 'action' => $this->getActionURL( $this->getContextTitle() ),
2413                                 'enctype' => 'multipart/form-data'
2414                         )
2415                 ) );
2416
2417                 if ( is_callable( $formCallback ) ) {
2418                         call_user_func_array( $formCallback, array( &$wgOut ) );
2419                 }
2420
2421                 // Add an empty field to trip up spambots
2422                 $wgOut->addHTML(
2423                         Xml::openElement( 'div', array( 'id' => 'antispam-container', 'style' => 'display: none;' ) )
2424                         . Html::rawElement(
2425                                 'label',
2426                                 array( 'for' => 'wpAntiSpam' ),
2427                                 wfMessage( 'simpleantispam-label' )->parse()
2428                         )
2429                         . Xml::element(
2430                                 'input',
2431                                 array(
2432                                         'type' => 'text',
2433                                         'name' => 'wpAntispam',
2434                                         'id' => 'wpAntispam',
2435                                         'value' => ''
2436                                 )
2437                         )
2438                         . Xml::closeElement( 'div' )
2439                 );
2440
2441                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2442
2443                 // Put these up at the top to ensure they aren't lost on early form submission
2444                 $this->showFormBeforeText();
2445
2446                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2447                         $username = $this->lastDelete->user_name;
2448                         $comment = $this->lastDelete->log_comment;
2449
2450                         // It is better to not parse the comment at all than to have templates expanded in the middle
2451                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2452                         $key = $comment === ''
2453                                 ? 'confirmrecreate-noreason'
2454                                 : 'confirmrecreate';
2455                         $wgOut->addHTML(
2456                                 '<div class="mw-confirm-recreate">' .
2457                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2458                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2459                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2460                                 ) .
2461                                 '</div>'
2462                         );
2463                 }
2464
2465                 # When the summary is hidden, also hide them on preview/show changes
2466                 if ( $this->nosummary ) {
2467                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2468                 }
2469
2470                 # If a blank edit summary was previously provided, and the appropriate
2471                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2472                 # user being bounced back more than once in the event that a summary
2473                 # is not required.
2474                 #####
2475                 # For a bit more sophisticated detection of blank summaries, hash the
2476                 # automatic one and pass that in the hidden field wpAutoSummary.
2477                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2478                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2479                 }
2480
2481                 if ( $this->undidRev ) {
2482                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2483                 }
2484
2485                 if ( $this->hasPresetSummary ) {
2486                         // If a summary has been preset using &summary= we don't want to prompt for
2487                         // a different summary. Only prompt for a summary if the summary is blanked.
2488                         // (Bug 17416)
2489                         $this->autoSumm = md5( '' );
2490                 }
2491
2492                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2493                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2494
2495                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2496
2497                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2498                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2499
2500                 if ( $this->section == 'new' ) {
2501                         $this->showSummaryInput( true, $this->summary );
2502                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2503                 }
2504
2505                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2506
2507                 if ( $this->contentModel === CONTENT_MODEL_WIKITEXT &&
2508                         $showToolbar && $wgUser->getOption( 'showtoolbar' ) )
2509                 {
2510                         $wgOut->addHTML( EditPage::getEditToolbar() );
2511                 }
2512
2513                 if ( $this->blankArticle ) {
2514                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankArticle', true ) );
2515                 }
2516
2517                 if ( $this->isConflict ) {
2518                         // In an edit conflict bypass the overridable content form method
2519                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2520                         // resolved between page source edits and custom ui edits using the
2521                         // custom edit ui.
2522                         $this->textbox2 = $this->textbox1;
2523
2524                         $content = $this->getCurrentContent();
2525                         $this->textbox1 = $this->toEditText( $content );
2526
2527                         $this->showTextbox1();
2528                 } else {
2529                         $this->showContentForm();
2530                 }
2531
2532                 $wgOut->addHTML( $this->editFormTextAfterContent );
2533
2534                 $this->showStandardInputs();
2535
2536                 $this->showFormAfterText();
2537
2538                 $this->showTosSummary();
2539
2540                 $this->showEditTools();
2541
2542                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2543
2544                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2545                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2546
2547                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2548                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2549
2550                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'limitreport' ),
2551                         self::getPreviewLimitReport( $this->mParserOutput ) ) );
2552
2553                 $wgOut->addModules( 'mediawiki.action.edit.collapsibleFooter' );
2554
2555                 if ( $this->isConflict ) {
2556                         try {
2557                                 $this->showConflict();
2558                         } catch ( MWContentSerializationException $ex ) {
2559                                 // this can't really happen, but be nice if it does.
2560                                 $msg = wfMessage(
2561                                         'content-failed-to-parse',
2562                                         $this->contentModel,
2563                                         $this->contentFormat,
2564                                         $ex->getMessage()
2565                                 );
2566                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
2567                         }
2568                 }
2569
2570                 // Marker for detecting truncated form data.  This must be the last
2571                 // parameter sent in order to be of use, so do not move me.
2572                 $wgOut->addHTML( Html::hidden( 'wpUltimateParam', true ) );
2573                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2574
2575                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2576                         $this->displayPreviewArea( $previewOutput, false );
2577                 }
2578
2579                 wfProfileOut( __METHOD__ );
2580         }
2581
2582         /**
2583          * Extract the section title from current section text, if any.
2584          *
2585          * @param string $text
2586          * @return string|bool String or false
2587          */
2588         public static function extractSectionTitle( $text ) {
2589                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2590                 if ( !empty( $matches[2] ) ) {
2591                         global $wgParser;
2592                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2593                 } else {
2594                         return false;
2595                 }
2596         }
2597
2598         /**
2599          * @return bool
2600          */
2601         protected function showHeader() {
2602                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2603                 global $wgAllowUserCss, $wgAllowUserJs;
2604
2605                 if ( $this->mTitle->isTalkPage() ) {
2606                         $wgOut->addWikiMsg( 'talkpagetext' );
2607                 }
2608
2609                 // Add edit notices
2610                 $wgOut->addHTML( implode( "\n", $this->mTitle->getEditNotices( $this->oldid ) ) );
2611
2612                 if ( $this->isConflict ) {
2613                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2614                         $this->edittime = $this->mArticle->getTimestamp();
2615                 } else {
2616                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2617                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2618                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2619                                 // Someone is welcome to try refactoring though
2620                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2621                                 return false;
2622                         }
2623
2624                         if ( $this->section != '' && $this->section != 'new' ) {
2625                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2626                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2627                                         if ( $sectionTitle !== false ) {
2628                                                 $this->summary = "/* $sectionTitle */ ";
2629                                         }
2630                                 }
2631                         }
2632
2633                         if ( $this->missingComment ) {
2634                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2635                         }
2636
2637                         if ( $this->missingSummary && $this->section != 'new' ) {
2638                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2639                         }
2640
2641                         if ( $this->missingSummary && $this->section == 'new' ) {
2642                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2643                         }
2644
2645                         if ( $this->blankArticle ) {
2646                                 $wgOut->wrapWikiMsg( "<div id='mw-blankarticle'>\n$1\n</div>", 'blankarticle' );
2647                         }
2648
2649                         if ( $this->hookError !== '' ) {
2650                                 $wgOut->addWikiText( $this->hookError );
2651                         }
2652
2653                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2654                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2655                         }
2656
2657                         if ( $this->section != 'new' ) {
2658                                 $revision = $this->mArticle->getRevisionFetched();
2659                                 if ( $revision ) {
2660                                         // Let sysop know that this will make private content public if saved
2661
2662                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2663                                                 $wgOut->wrapWikiMsg(
2664                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2665                                                         'rev-deleted-text-permission'
2666                                                 );
2667                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2668                                                 $wgOut->wrapWikiMsg(
2669                                                         "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
2670                                                         'rev-deleted-text-view'
2671                                                 );
2672                                         }
2673
2674                                         if ( !$revision->isCurrent() ) {
2675                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2676                                                 $wgOut->addWikiMsg( 'editingold' );
2677                                         }
2678                                 } elseif ( $this->mTitle->exists() ) {
2679                                         // Something went wrong
2680
2681                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2682                                                 array( 'missing-revision', $this->oldid ) );
2683                                 }
2684                         }
2685                 }
2686
2687                 if ( wfReadOnly() ) {
2688                         $wgOut->wrapWikiMsg(
2689                                 "<div id=\"mw-read-only-warning\">\n$1\n</div>",
2690                                 array( 'readonlywarning', wfReadOnlyReason() )
2691                         );
2692                 } elseif ( $wgUser->isAnon() ) {
2693                         if ( $this->formtype != 'preview' ) {
2694                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2695                         } else {
2696                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2697                         }
2698                 } else {
2699                         if ( $this->isCssJsSubpage ) {
2700                                 # Check the skin exists
2701                                 if ( $this->isWrongCaseCssJsPage ) {
2702                                         $wgOut->wrapWikiMsg(
2703                                                 "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>",
2704                                                 array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() )
2705                                         );
2706                                 }
2707                                 if ( $this->formtype !== 'preview' ) {
2708                                         if ( $this->isCssSubpage && $wgAllowUserCss ) {
2709                                                 $wgOut->wrapWikiMsg(
2710                                                         "<div id='mw-usercssyoucanpreview'>\n$1\n</div>",
2711                                                         array( 'usercssyoucanpreview' )
2712                                                 );
2713                                         }
2714
2715                                         if ( $this->isJsSubpage && $wgAllowUserJs ) {
2716                                                 $wgOut->wrapWikiMsg(
2717                                                         "<div id='mw-userjsyoucanpreview'>\n$1\n</div>",
2718                                                         array( 'userjsyoucanpreview' )
2719                                                 );
2720                                         }
2721                                 }
2722                         }
2723                 }
2724
2725                 if ( $this->mTitle->isProtected( 'edit' ) &&
2726                         MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2727                 ) {
2728                         # Is the title semi-protected?
2729                         if ( $this->mTitle->isSemiProtected() ) {
2730                                 $noticeMsg = 'semiprotectedpagewarning';
2731                         } else {
2732                                 # Then it must be protected based on static groups (regular)
2733                                 $noticeMsg = 'protectedpagewarning';
2734                         }
2735                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2736                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2737                 }
2738                 if ( $this->mTitle->isCascadeProtected() ) {
2739                         # Is this page under cascading protection from some source pages?
2740                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2741                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2742                         $cascadeSourcesCount = count( $cascadeSources );
2743                         if ( $cascadeSourcesCount > 0 ) {
2744                                 # Explain, and list the titles responsible
2745                                 foreach ( $cascadeSources as $page ) {
2746                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2747                                 }
2748                         }
2749                         $notice .= '</div>';
2750                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2751                 }
2752                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2753                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2754                                 array( 'lim' => 1,
2755                                         'showIfEmpty' => false,
2756                                         'msgKey' => array( 'titleprotectedwarning' ),
2757                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2758                 }
2759
2760                 if ( $this->kblength === false ) {
2761                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2762                 }
2763
2764                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2765                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2766                                 array(
2767                                         'longpageerror',
2768                                         $wgLang->formatNum( $this->kblength ),
2769                                         $wgLang->formatNum( $wgMaxArticleSize )
2770                                 )
2771                         );
2772                 } else {
2773                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2774                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2775                                         array(
2776                                                 'longpage-hint',
2777                                                 $wgLang->formatSize( strlen( $this->textbox1 ) ),
2778                                                 strlen( $this->textbox1 )
2779                                         )
2780                                 );
2781                         }
2782                 }
2783                 # Add header copyright warning
2784                 $this->showHeaderCopyrightWarning();
2785
2786                 return true;
2787         }
2788
2789         /**
2790          * Standard summary input and label (wgSummary), abstracted so EditPage
2791          * subclasses may reorganize the form.
2792          * Note that you do not need to worry about the label's for=, it will be
2793          * inferred by the id given to the input. You can remove them both by
2794          * passing array( 'id' => false ) to $userInputAttrs.
2795          *
2796          * @param string $summary The value of the summary input
2797          * @param string $labelText The html to place inside the label
2798          * @param array $inputAttrs Array of attrs to use on the input
2799          * @param array $spanLabelAttrs Array of attrs to use on the span inside the label
2800          *
2801          * @return array An array in the format array( $label, $input )
2802          */
2803         function getSummaryInput( $summary = "", $labelText = null,
2804                 $inputAttrs = null, $spanLabelAttrs = null
2805         ) {
2806                 // Note: the maxlength is overridden in JS to 255 and to make it use UTF-8 bytes, not characters.
2807                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2808                         'id' => 'wpSummary',
2809                         'maxlength' => '200',
2810                         'tabindex' => '1',
2811                         'size' => 60,
2812                         'spellcheck' => 'true',
2813                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2814
2815                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2816                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2817                         'id' => "wpSummaryLabel"
2818                 );
2819
2820                 $label = null;
2821                 if ( $labelText ) {
2822                         $label = Xml::tags(
2823                                 'label',
2824                                 $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null,
2825                                 $labelText
2826                         );
2827                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2828                 }
2829
2830                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2831
2832                 return array( $label, $input );
2833         }
2834
2835         /**
2836          * @param bool $isSubjectPreview True if this is the section subject/title
2837          *   up top, or false if this is the comment summary
2838          *   down below the textarea
2839          * @param string $summary The text of the summary to display
2840          * @return string
2841          */
2842         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2843                 global $wgOut, $wgContLang;
2844                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2845                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2846                 if ( $isSubjectPreview ) {
2847                         if ( $this->nosummary ) {
2848                                 return;
2849                         }
2850                 } else {
2851                         if ( !$this->mShowSummaryField ) {
2852                                 return;
2853                         }
2854                 }
2855                 $summary = $wgContLang->recodeForEdit( $summary );
2856                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2857                 list( $label, $input ) = $this->getSummaryInput(
2858                         $summary,
2859                         $labelText,
2860                         array( 'class' => $summaryClass ),
2861                         array()
2862                 );
2863                 $wgOut->addHTML( "{$label} {$input}" );
2864         }
2865
2866         /**
2867          * @param bool $isSubjectPreview True if this is the section subject/title
2868          *   up top, or false if this is the comment summary
2869          *   down below the textarea
2870          * @param string $summary The text of the summary to display
2871          * @return string
2872          */
2873         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2874                 // avoid spaces in preview, gets always trimmed on save
2875                 $summary = trim( $summary );
2876                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2877                         return "";
2878                 }
2879
2880                 global $wgParser;
2881
2882                 if ( $isSubjectPreview ) {
2883                         $summary = wfMessage( 'newsectionsummary' )->rawParams( $wgParser->stripSectionName( $summary ) )
2884                                 ->inContentLanguage()->text();
2885                 }
2886
2887                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2888
2889                 $summary = wfMessage( $message )->parse()
2890                         . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2891                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2892         }
2893
2894         protected function showFormBeforeText() {
2895                 global $wgOut;
2896                 $section = htmlspecialchars( $this->section );
2897                 $wgOut->addHTML( <<<HTML
2898 <input type='hidden' value="{$section}" name="wpSection" />
2899 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2900 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2901 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2902
2903 HTML
2904                 );
2905                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2906                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2907                 }
2908         }
2909
2910         protected function showFormAfterText() {
2911                 global $wgOut, $wgUser;
2912                 /**
2913                  * To make it harder for someone to slip a user a page
2914                  * which submits an edit form to the wiki without their
2915                  * knowledge, a random token is associated with the login
2916                  * session. If it's not passed back with the submission,
2917                  * we won't save the page, or render user JavaScript and
2918                  * CSS previews.
2919                  *
2920                  * For anon editors, who may not have a session, we just
2921                  * include the constant suffix to prevent editing from
2922                  * broken text-mangling proxies.
2923                  */
2924                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2925         }
2926
2927         /**
2928          * Subpage overridable method for printing the form for page content editing
2929          * By default this simply outputs wpTextbox1
2930          * Subclasses can override this to provide a custom UI for editing;
2931          * be it a form, or simply wpTextbox1 with a modified content that will be
2932          * reverse modified when extracted from the post data.
2933          * Note that this is basically the inverse for importContentFormData
2934          */
2935         protected function showContentForm() {
2936                 $this->showTextbox1();
2937         }
2938
2939         /**
2940          * Method to output wpTextbox1
2941          * The $textoverride method can be used by subclasses overriding showContentForm
2942          * to pass back to this method.
2943          *
2944          * @param array $customAttribs Array of html attributes to use in the textarea
2945          * @param string $textoverride Optional text to override $this->textarea1 with
2946          */
2947         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2948                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2949                         $attribs = array( 'style' => 'display:none;' );
2950                 } else {
2951                         $classes = array(); // Textarea CSS
2952                         if ( $this->mTitle->isProtected( 'edit' ) &&
2953                                 MWNamespace::getRestrictionLevels( $this->mTitle->getNamespace() ) !== array( '' )
2954                         ) {
2955                                 # Is the title semi-protected?
2956                                 if ( $this->mTitle->isSemiProtected() ) {
2957                                         $classes[] = 'mw-textarea-sprotected';
2958                                 } else {
2959                                         # Then it must be protected based on static groups (regular)
2960                                         $classes[] = 'mw-textarea-protected';
2961                                 }
2962                                 # Is the title cascade-protected?
2963                                 if ( $this->mTitle->isCascadeProtected() ) {
2964                                         $classes[] = 'mw-textarea-cprotected';
2965                                 }
2966                         }
2967
2968                         $attribs = array( 'tabindex' => 1 );
2969
2970                         if ( is_array( $customAttribs ) ) {
2971                                 $attribs += $customAttribs;
2972                         }
2973
2974                         if ( count( $classes ) ) {
2975                                 if ( isset( $attribs['class'] ) ) {
2976                                         $classes[] = $attribs['class'];
2977                                 }
2978                                 $attribs['class'] = implode( ' ', $classes );
2979                         }
2980                 }
2981
2982                 $this->showTextbox(
2983                         $textoverride !== null ? $textoverride : $this->textbox1,
2984                         'wpTextbox1',
2985                         $attribs
2986                 );
2987         }
2988
2989         protected function showTextbox2() {
2990                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2991         }
2992
2993         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2994                 global $wgOut, $wgUser;
2995
2996                 $wikitext = $this->safeUnicodeOutput( $text );
2997                 if ( strval( $wikitext ) !== '' ) {
2998                         // Ensure there's a newline at the end, otherwise adding lines
2999                         // is awkward.
3000                         // But don't add a newline if the ext is empty, or Firefox in XHTML
3001                         // mode will show an extra newline. A bit annoying.
3002                         $wikitext .= "\n";
3003                 }
3004
3005                 $attribs = $customAttribs + array(
3006                         'accesskey' => ',',
3007                         'id' => $name,
3008                         'cols' => $wgUser->getIntOption( 'cols' ),
3009                         'rows' => $wgUser->getIntOption( 'rows' ),
3010                         // Avoid PHP notices when appending preferences
3011                         // (appending allows customAttribs['style'] to still work).
3012                         'style' => ''
3013                 );
3014
3015                 $pageLang = $this->mTitle->getPageLanguage();
3016                 $attribs['lang'] = $pageLang->getCode();
3017                 $attribs['dir'] = $pageLang->getDir();
3018
3019                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
3020         }
3021
3022         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
3023                 global $wgOut;
3024                 $classes = array();
3025                 if ( $isOnTop ) {
3026                         $classes[] = 'ontop';
3027                 }
3028
3029                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
3030
3031                 if ( $this->formtype != 'preview' ) {
3032                         $attribs['style'] = 'display: none;';
3033                 }
3034
3035                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
3036
3037                 if ( $this->formtype == 'preview' ) {
3038                         $this->showPreview( $previewOutput );
3039                 }
3040
3041                 $wgOut->addHTML( '</div>' );
3042
3043                 if ( $this->formtype == 'diff' ) {
3044                         try {
3045                                 $this->showDiff();
3046                         } catch ( MWContentSerializationException $ex ) {
3047                                 $msg = wfMessage(
3048                                         'content-failed-to-parse',
3049                                         $this->contentModel,
3050                                         $this->contentFormat,
3051                                         $ex->getMessage()
3052                                 );
3053                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>' );
3054                         }
3055                 }
3056         }
3057
3058         /**
3059          * Append preview output to $wgOut.
3060          * Includes category rendering if this is a category page.
3061          *
3062          * @param string $text The HTML to be output for the preview.
3063          */
3064         protected function showPreview( $text ) {
3065                 global $wgOut;
3066                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3067                         $this->mArticle->openShowCategory();
3068                 }
3069                 # This hook seems slightly odd here, but makes things more
3070                 # consistent for extensions.
3071                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
3072                 $wgOut->addHTML( $text );
3073                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
3074                         $this->mArticle->closeShowCategory();
3075                 }
3076         }
3077
3078         /**
3079          * Get a diff between the current contents of the edit box and the
3080          * version of the page we're editing from.
3081          *
3082          * If this is a section edit, we'll replace the section as for final
3083          * save and then make a comparison.
3084          */
3085         function showDiff() {
3086                 global $wgUser, $wgContLang, $wgOut;
3087
3088                 $oldtitlemsg = 'currentrev';
3089                 # if message does not exist, show diff against the preloaded default
3090                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
3091                         $oldtext = $this->mTitle->getDefaultMessageText();
3092                         if ( $oldtext !== false ) {
3093                                 $oldtitlemsg = 'defaultmessagetext';
3094                                 $oldContent = $this->toEditContent( $oldtext );
3095                         } else {
3096                                 $oldContent = null;
3097                         }
3098                 } else {
3099                         $oldContent = $this->getCurrentContent();
3100                 }
3101
3102                 $textboxContent = $this->toEditContent( $this->textbox1 );
3103
3104                 $newContent = $this->mArticle->replaceSectionContent(
3105                                                         $this->section, $textboxContent,
3106                                                         $this->summary, $this->edittime );
3107
3108                 if ( $newContent ) {
3109                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
3110                         wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
3111
3112                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
3113                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
3114                 }
3115
3116                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
3117                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
3118                         $newtitle = wfMessage( 'yourtext' )->parse();
3119
3120                         if ( !$oldContent ) {
3121                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
3122                         }
3123
3124                         if ( !$newContent ) {
3125                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
3126                         }
3127
3128                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
3129                         $de->setContent( $oldContent, $newContent );
3130
3131                         $difftext = $de->getDiff( $oldtitle, $newtitle );
3132                         $de->showDiffStyle();
3133                 } else {
3134                         $difftext = '';
3135                 }
3136
3137                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
3138         }
3139
3140         /**
3141          * Show the header copyright warning.
3142          */
3143         protected function showHeaderCopyrightWarning() {
3144                 $msg = 'editpage-head-copy-warn';
3145                 if ( !wfMessage( $msg )->isDisabled() ) {
3146                         global $wgOut;
3147                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
3148                                 'editpage-head-copy-warn' );
3149                 }
3150         }
3151
3152         /**
3153          * Give a chance for site and per-namespace customizations of
3154          * terms of service summary link that might exist separately
3155          * from the copyright notice.
3156          *
3157          * This will display between the save button and the edit tools,
3158          * so should remain short!
3159          */
3160         protected function showTosSummary() {
3161                 $msg = 'editpage-tos-summary';
3162                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
3163                 if ( !wfMessage( $msg )->isDisabled() ) {
3164                         global $wgOut;
3165                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
3166                         $wgOut->addWikiMsg( $msg );
3167                         $wgOut->addHTML( '</div>' );
3168                 }
3169         }
3170
3171         protected function showEditTools() {
3172                 global $wgOut;
3173                 $wgOut->addHTML( '<div class="mw-editTools">' .
3174                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
3175                         '</div>' );
3176         }
3177
3178         /**
3179          * Get the copyright warning
3180          *
3181          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
3182          */
3183         protected function getCopywarn() {
3184                 return self::getCopyrightWarning( $this->mTitle );
3185         }
3186
3187         /**
3188          * Get the copyright warning, by default returns wikitext
3189          *
3190          * @param Title $title
3191          * @param string $format Output format, valid values are any function of a Message object
3192          * @return string
3193          */
3194         public static function getCopyrightWarning( $title, $format = 'plain' ) {
3195                 global $wgRightsText;
3196                 if ( $wgRightsText ) {
3197                         $copywarnMsg = array( 'copyrightwarning',
3198                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
3199                                 $wgRightsText );
3200                 } else {
3201                         $copywarnMsg = array( 'copyrightwarning2',
3202                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
3203                 }
3204                 // Allow for site and per-namespace customization of contribution/copyright notice.
3205                 wfRunHooks( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
3206
3207                 return "<div id=\"editpage-copywarn\">\n" .
3208                         call_user_func_array( 'wfMessage', $copywarnMsg )->$format() . "\n</div>";
3209         }
3210
3211         /**
3212          * Get the Limit report for page previews
3213          *
3214          * @since 1.22
3215          * @param ParserOutput $output ParserOutput object from the parse
3216          * @return string HTML
3217          */
3218         public static function getPreviewLimitReport( $output ) {
3219                 if ( !$output || !$output->getLimitReportData() ) {
3220                         return '';
3221                 }
3222
3223                 wfProfileIn( __METHOD__ );
3224
3225                 $limitReport = Html::rawElement( 'div', array( 'class' => 'mw-limitReportExplanation' ),
3226                         wfMessage( 'limitreport-title' )->parseAsBlock()
3227                 );
3228
3229                 // Show/hide animation doesn't work correctly on a table, so wrap it in a div.
3230                 $limitReport .= Html::openElement( 'div', array( 'class' => 'preview-limit-report-wrapper' ) );
3231
3232                 $limitReport .= Html::openElement( 'table', array(
3233                         'class' => 'preview-limit-report wikitable'
3234                 ) ) .
3235                         Html::openElement( 'tbody' );
3236
3237                 foreach ( $output->getLimitReportData() as $key => $value ) {
3238                         if ( wfRunHooks( 'ParserLimitReportFormat',
3239                                 array( $key, &$value, &$limitReport, true, true )
3240                         ) ) {
3241                                 $keyMsg = wfMessage( $key );
3242                                 $valueMsg = wfMessage( array( "$key-value-html", "$key-value" ) );
3243                                 if ( !$valueMsg->exists() ) {
3244                                         $valueMsg = new RawMessage( '$1' );
3245                                 }
3246                                 if ( !$keyMsg->isDisabled() && !$valueMsg->isDisabled() ) {
3247                                         $limitReport .= Html::openElement( 'tr' ) .
3248                                                 Html::rawElement( 'th', null, $keyMsg->parse() ) .
3249                                                 Html::rawElement( 'td', null, $valueMsg->params( $value )->parse() ) .
3250                                                 Html::closeElement( 'tr' );
3251                                 }
3252                         }
3253                 }
3254
3255                 $limitReport .= Html::closeElement( 'tbody' ) .
3256                         Html::closeElement( 'table' ) .
3257                         Html::closeElement( 'div' );
3258
3259                 wfProfileOut( __METHOD__ );
3260
3261                 return $limitReport;
3262         }
3263
3264         protected function showStandardInputs( &$tabindex = 2 ) {
3265                 global $wgOut;
3266                 $wgOut->addHTML( "<div class='editOptions'>\n" );
3267
3268                 if ( $this->section != 'new' ) {
3269                         $this->showSummaryInput( false, $this->summary );
3270                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
3271                 }
3272
3273                 $checkboxes = $this->getCheckboxes( $tabindex,
3274                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
3275                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
3276
3277                 // Show copyright warning.
3278                 $wgOut->addWikiText( $this->getCopywarn() );
3279                 $wgOut->addHTML( $this->editFormTextAfterWarn );
3280
3281                 $wgOut->addHTML( "<div class='editButtons'>\n" );
3282                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
3283
3284                 $cancel = $this->getCancelLink();
3285                 if ( $cancel !== '' ) {
3286                         $cancel .= Html::element( 'span',
3287                                 array( 'class' => 'mw-editButtons-pipe-separator' ),
3288                                 wfMessage( 'pipe-separator' )->text() );
3289                 }
3290
3291                 $message = wfMessage( 'edithelppage' )->inContentLanguage()->text();
3292                 $edithelpurl = Skin::makeInternalOrExternalUrl( $message );
3293                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
3294                         wfMessage( 'edithelp' )->escaped() . '</a> ' .
3295                         wfMessage( 'newwindow' )->parse();
3296
3297                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
3298                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
3299                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
3300
3301                 wfRunHooks( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
3302
3303                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
3304         }
3305
3306         /**
3307          * Show an edit conflict. textbox1 is already shown in showEditForm().
3308          * If you want to use another entry point to this function, be careful.
3309          */
3310         protected function showConflict() {
3311                 global $wgOut;
3312
3313                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
3314                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3315
3316                         $content1 = $this->toEditContent( $this->textbox1 );
3317                         $content2 = $this->toEditContent( $this->textbox2 );
3318
3319                         $handler = ContentHandler::getForModelID( $this->contentModel );
3320                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
3321                         $de->setContent( $content2, $content1 );
3322                         $de->showDiff(
3323                                 wfMessage( 'yourtext' )->parse(),
3324                                 wfMessage( 'storedversion' )->text()
3325                         );
3326
3327                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3328                         $this->showTextbox2();
3329                 }
3330         }
3331
3332         /**
3333          * @return string
3334          */
3335         public function getCancelLink() {
3336                 $cancelParams = array();
3337                 if ( !$this->isConflict && $this->oldid > 0 ) {
3338                         $cancelParams['oldid'] = $this->oldid;
3339                 }
3340
3341                 return Linker::linkKnown(
3342                         $this->getContextTitle(),
3343                         wfMessage( 'cancel' )->parse(),
3344                         array( 'id' => 'mw-editform-cancel' ),
3345                         $cancelParams
3346                 );
3347         }
3348
3349         /**
3350          * Returns the URL to use in the form's action attribute.
3351          * This is used by EditPage subclasses when simply customizing the action
3352          * variable in the constructor is not enough. This can be used when the
3353          * EditPage lives inside of a Special page rather than a custom page action.
3354          *
3355          * @param Title $title Title object for which is being edited (where we go to for &action= links)
3356          * @return string
3357          */
3358         protected function getActionURL( Title $title ) {
3359                 return $title->getLocalURL( array( 'action' => $this->action ) );
3360         }
3361
3362         /**
3363          * Check if a page was deleted while the user was editing it, before submit.
3364          * Note that we rely on the logging table, which hasn't been always there,
3365          * but that doesn't matter, because this only applies to brand new
3366          * deletes.
3367          * @return bool
3368          */
3369         protected function wasDeletedSinceLastEdit() {
3370                 if ( $this->deletedSinceEdit !== null ) {
3371                         return $this->deletedSinceEdit;
3372                 }
3373
3374                 $this->deletedSinceEdit = false;
3375
3376                 if ( $this->mTitle->isDeletedQuick() ) {
3377                         $this->lastDelete = $this->getLastDelete();
3378                         if ( $this->lastDelete ) {
3379                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
3380                                 if ( $deleteTime > $this->starttime ) {
3381                                         $this->deletedSinceEdit = true;
3382                                 }
3383                         }
3384                 }
3385
3386                 return $this->deletedSinceEdit;
3387         }
3388
3389         /**
3390          * @return bool|stdClass
3391          */
3392         protected function getLastDelete() {
3393                 $dbr = wfGetDB( DB_SLAVE );
3394                 $data = $dbr->selectRow(
3395                         array( 'logging', 'user' ),
3396                         array(
3397                                 'log_type',
3398                                 'log_action',
3399                                 'log_timestamp',
3400                                 'log_user',
3401                                 'log_namespace',
3402                                 'log_title',
3403                                 'log_comment',
3404                                 'log_params',
3405                                 'log_deleted',
3406                                 'user_name'
3407                         ), array(
3408                                 'log_namespace' => $this->mTitle->getNamespace(),
3409                                 'log_title' => $this->mTitle->getDBkey(),
3410                                 'log_type' => 'delete',
3411                                 'log_action' => 'delete',
3412                                 'user_id=log_user'
3413                         ),
3414                         __METHOD__,
3415                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
3416                 );
3417                 // Quick paranoid permission checks...
3418                 if ( is_object( $data ) ) {
3419                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
3420                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
3421                         }
3422
3423                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
3424                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
3425                         }
3426                 }
3427
3428                 return $data;
3429         }
3430
3431         /**
3432          * Get the rendered text for previewing.
3433          * @throws MWException
3434          * @return string
3435          */
3436         function getPreviewText() {
3437                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
3438                 global $wgAllowUserCss, $wgAllowUserJs;
3439
3440                 wfProfileIn( __METHOD__ );
3441
3442                 if ( $wgRawHtml && !$this->mTokenOk ) {
3443                         // Could be an offsite preview attempt. This is very unsafe if
3444                         // HTML is enabled, as it could be an attack.
3445                         $parsedNote = '';
3446                         if ( $this->textbox1 !== '' ) {
3447                                 // Do not put big scary notice, if previewing the empty
3448                                 // string, which happens when you initially edit
3449                                 // a category page, due to automatic preview-on-open.
3450                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
3451                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
3452                         }
3453                         wfProfileOut( __METHOD__ );
3454                         return $parsedNote;
3455                 }
3456
3457                 $note = '';
3458
3459                 try {
3460                         $content = $this->toEditContent( $this->textbox1 );
3461
3462                         $previewHTML = '';
3463                         if ( !wfRunHooks(
3464                                 'AlternateEditPreview',
3465                                 array( $this, &$content, &$previewHTML, &$this->mParserOutput ) )
3466                         ) {
3467                                 wfProfileOut( __METHOD__ );
3468                                 return $previewHTML;
3469                         }
3470
3471                         # provide a anchor link to the editform
3472                         $continueEditing = '<span class="mw-continue-editing">' .
3473                                 '[[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' .
3474                                 wfMessage( 'continue-editing' )->text() . ']]</span>';
3475                         if ( $this->mTriedSave && !$this->mTokenOk ) {
3476                                 if ( $this->mTokenOkExceptSuffix ) {
3477                                         $note = wfMessage( 'token_suffix_mismatch' )->plain();
3478                                 } else {
3479                                         $note = wfMessage( 'session_fail_preview' )->plain();
3480                                 }
3481                         } elseif ( $this->incompleteForm ) {
3482                                 $note = wfMessage( 'edit_form_incomplete' )->plain();
3483                         } else {
3484                                 $note = wfMessage( 'previewnote' )->plain() . ' ' . $continueEditing;
3485                         }
3486
3487                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
3488                         $parserOptions->setEditSection( false );
3489                         $parserOptions->setIsPreview( true );
3490                         $parserOptions->setIsSectionPreview( !is_null( $this->section ) && $this->section !== '' );
3491
3492                         # don't parse non-wikitext pages, show message about preview
3493                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
3494                                 if ( $this->mTitle->isCssJsSubpage() ) {
3495                                         $level = 'user';
3496                                 } elseif ( $this->mTitle->isCssOrJsPage() ) {
3497                                         $level = 'site';
3498                                 } else {
3499                                         $level = false;
3500                                 }
3501
3502                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
3503                                         $format = 'css';
3504                                         if ( $level === 'user' && !$wgAllowUserCss ) {
3505                                                 $format = false;
3506                                         }
3507                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
3508                                         $format = 'js';
3509                                         if ( $level === 'user' && !$wgAllowUserJs ) {
3510                                                 $format = false;
3511                                         }
3512                                 } else {
3513                                         $format = false;
3514                                 }
3515
3516                                 # Used messages to make sure grep find them:
3517                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
3518                                 if ( $level && $format ) {
3519                                         $note = "<div id='mw-{$level}{$format}preview'>" .
3520                                                 wfMessage( "{$level}{$format}preview" )->text() .
3521                                                 ' ' . $continueEditing . "</div>";
3522                                 }
3523                         }
3524
3525                         # If we're adding a comment, we need to show the
3526                         # summary as the headline
3527                         if ( $this->section === "new" && $this->summary !== "" ) {
3528                                 $content = $content->addSectionHeader( $this->summary );
3529                         }
3530
3531                         $hook_args = array( $this, &$content );
3532                         ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
3533                         wfRunHooks( 'EditPageGetPreviewContent', $hook_args );
3534
3535                         $parserOptions->enableLimitReport();
3536
3537                         # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
3538                         # But it's now deprecated, so never mind
3539
3540                         $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
3541                         $parserOutput = $content->getParserOutput(
3542                                 $this->getArticle()->getTitle(),
3543                                 null,
3544                                 $parserOptions
3545                         );
3546
3547                         $previewHTML = $parserOutput->getText();
3548                         $this->mParserOutput = $parserOutput;
3549                         $wgOut->addParserOutputMetadata( $parserOutput );
3550
3551                         if ( count( $parserOutput->getWarnings() ) ) {
3552                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
3553                         }
3554                 } catch ( MWContentSerializationException $ex ) {
3555                         $m = wfMessage(
3556                                 'content-failed-to-parse',
3557                                 $this->contentModel,
3558                                 $this->contentFormat,
3559                                 $ex->getMessage()
3560                         );
3561                         $note .= "\n\n" . $m->parse();
3562                         $previewHTML = '';
3563                 }
3564
3565                 if ( $this->isConflict ) {
3566                         $conflict = '<h2 id="mw-previewconflict">'
3567                                 . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3568                 } else {
3569                         $conflict = '<hr />';
3570                 }
3571
3572                 $previewhead = "<div class='previewnote'>\n" .
3573                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3574                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3575
3576                 $pageViewLang = $this->mTitle->getPageViewLanguage();
3577                 $attribs = array( 'lang' => $pageViewLang->getHtmlCode(), 'dir' => $pageViewLang->getDir(),
3578                         'class' => 'mw-content-' . $pageViewLang->getDir() );
3579                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3580
3581                 wfProfileOut( __METHOD__ );
3582                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3583         }
3584
3585         /**
3586          * @return array
3587          */
3588         function getTemplates() {
3589                 if ( $this->preview || $this->section != '' ) {
3590                         $templates = array();
3591                         if ( !isset( $this->mParserOutput ) ) {
3592                                 return $templates;
3593                         }
3594                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3595                                 foreach ( array_keys( $template ) as $dbk ) {
3596                                         $templates[] = Title::makeTitle( $ns, $dbk );
3597                                 }
3598                         }
3599                         return $templates;
3600                 } else {
3601                         return $this->mTitle->getTemplateLinksFrom();
3602                 }
3603         }
3604
3605         /**
3606          * Shows a bulletin board style toolbar for common editing functions.
3607          * It can be disabled in the user preferences.
3608          * The necessary JavaScript code can be found in skins/common/edit.js.
3609          *
3610          * @return string
3611          */
3612         static function getEditToolbar() {
3613                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
3614                 global $wgEnableUploads, $wgForeignFileRepos;
3615
3616                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3617
3618                 /**
3619                  * $toolarray is an array of arrays each of which includes the
3620                  * filename of the button image (without path), the opening
3621                  * tag, the closing tag, optionally a sample text that is
3622                  * inserted between the two when no selection is highlighted
3623                  * and.  The tip text is shown when the user moves the mouse
3624                  * over the button.
3625                  *
3626                  * Also here: accesskeys (key), which are not used yet until
3627                  * someone can figure out a way to make them work in
3628                  * IE. However, we should make sure these keys are not defined
3629                  * on the edit page.
3630                  */
3631                 $toolarray = array(
3632                         array(
3633                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
3634                                 'id'     => 'mw-editbutton-bold',
3635                                 'open'   => '\'\'\'',
3636                                 'close'  => '\'\'\'',
3637                                 'sample' => wfMessage( 'bold_sample' )->text(),
3638                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3639                                 'key'    => 'B'
3640                         ),
3641                         array(
3642                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
3643                                 'id'     => 'mw-editbutton-italic',
3644                                 'open'   => '\'\'',
3645                                 'close'  => '\'\'',
3646                                 'sample' => wfMessage( 'italic_sample' )->text(),
3647                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3648                                 'key'    => 'I'
3649                         ),
3650                         array(
3651                                 'image'  => $wgLang->getImageFile( 'button-link' ),
3652                                 'id'     => 'mw-editbutton-link',
3653                                 'open'   => '[[',
3654                                 'close'  => ']]',
3655                                 'sample' => wfMessage( 'link_sample' )->text(),
3656                                 'tip'    => wfMessage( 'link_tip' )->text(),
3657                                 'key'    => 'L'
3658                         ),
3659                         array(
3660                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
3661                                 'id'     => 'mw-editbutton-extlink',
3662                                 'open'   => '[',
3663                                 'close'  => ']',
3664                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3665                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3666                                 'key'    => 'X'
3667                         ),
3668                         array(
3669                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
3670                                 'id'     => 'mw-editbutton-headline',
3671                                 'open'   => "\n== ",
3672                                 'close'  => " ==\n",
3673                                 'sample' => wfMessage( 'headline_sample' )->text(),
3674                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3675                                 'key'    => 'H'
3676                         ),
3677                         $imagesAvailable ? array(
3678                                 'image'  => $wgLang->getImageFile( 'button-image' ),
3679                                 'id'     => 'mw-editbutton-image',
3680                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3681                                 'close'  => ']]',
3682                                 'sample' => wfMessage( 'image_sample' )->text(),
3683                                 'tip'    => wfMessage( 'image_tip' )->text(),
3684                                 'key'    => 'D',
3685                         ) : false,
3686                         $imagesAvailable ? array(
3687                                 'image'  => $wgLang->getImageFile( 'button-media' ),
3688                                 'id'     => 'mw-editbutton-media',
3689                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3690                                 'close'  => ']]',
3691                                 'sample' => wfMessage( 'media_sample' )->text(),
3692                                 'tip'    => wfMessage( 'media_tip' )->text(),
3693                                 'key'    => 'M'
3694                         ) : false,
3695                         array(
3696                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
3697                                 'id'     => 'mw-editbutton-nowiki',
3698                                 'open'   => "<nowiki>",
3699                                 'close'  => "</nowiki>",
3700                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3701                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3702                                 'key'    => 'N'
3703                         ),
3704                         array(
3705                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
3706                                 'id'     => 'mw-editbutton-signature',
3707                                 'open'   => '--~~~~',
3708                                 'close'  => '',
3709                                 'sample' => '',
3710                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3711                                 'key'    => 'Y'
3712                         ),
3713                         array(
3714                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
3715                                 'id'     => 'mw-editbutton-hr',
3716                                 'open'   => "\n----\n",
3717                                 'close'  => '',
3718                                 'sample' => '',
3719                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3720                                 'key'    => 'R'
3721                         )
3722                 );
3723
3724                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3725                 foreach ( $toolarray as $tool ) {
3726                         if ( !$tool ) {
3727                                 continue;
3728                         }
3729
3730                         $params = array(
3731                                 $wgStylePath . '/common/images/' . $tool['image'],
3732                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3733                                 // Older browsers show a "speedtip" type message only for ALT.
3734                                 // Ideally these should be different, realistically they
3735                                 // probably don't need to be.
3736                                 $tool['tip'],
3737                                 $tool['open'],
3738                                 $tool['close'],
3739                                 $tool['sample'],
3740                                 $tool['id'],
3741                         );
3742
3743                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3744                 }
3745
3746                 // This used to be called on DOMReady from mediawiki.action.edit, which
3747                 // ended up causing race conditions with the setup code above.
3748                 $script .= "\n" .
3749                         "// Create button bar\n" .
3750                         "$(function() { mw.toolbar.init(); } );\n";
3751
3752                 $script .= '});';
3753                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3754
3755                 $toolbar = '<div id="toolbar"></div>';
3756
3757                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3758
3759                 return $toolbar;
3760         }
3761
3762         /**
3763          * Returns an array of html code of the following checkboxes:
3764          * minor and watch
3765          *
3766          * @param int $tabindex Current tabindex
3767          * @param array $checked Array of checkbox => bool, where bool indicates the checked
3768          *                 status of the checkbox
3769          *
3770          * @return array
3771          */
3772         public function getCheckboxes( &$tabindex, $checked ) {
3773                 global $wgUser;
3774
3775                 $checkboxes = array();
3776
3777                 // don't show the minor edit checkbox if it's a new page or section
3778                 if ( !$this->isNew ) {
3779                         $checkboxes['minor'] = '';
3780                         $minorLabel = wfMessage( 'minoredit' )->parse();
3781                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3782                                 $attribs = array(
3783                                         'tabindex' => ++$tabindex,
3784                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3785                                         'id' => 'wpMinoredit',
3786                                 );
3787                                 $checkboxes['minor'] =
3788                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3789                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3790                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3791                                         ">{$minorLabel}</label>";
3792                         }
3793                 }
3794
3795                 $watchLabel = wfMessage( 'watchthis' )->parse();
3796                 $checkboxes['watch'] = '';
3797                 if ( $wgUser->isLoggedIn() ) {
3798                         $attribs = array(
3799                                 'tabindex' => ++$tabindex,
3800                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3801                                 'id' => 'wpWatchthis',
3802                         );
3803                         $checkboxes['watch'] =
3804                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3805                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3806                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3807                                 ">{$watchLabel}</label>";
3808                 }
3809                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3810                 return $checkboxes;
3811         }
3812
3813         /**
3814          * Returns an array of html code of the following buttons:
3815          * save, diff, preview and live
3816          *
3817          * @param int $tabindex Current tabindex
3818          *
3819          * @return array
3820          */
3821         public function getEditButtons( &$tabindex ) {
3822                 $buttons = array();
3823
3824                 $attribs = array(
3825                         'id' => 'wpSave',
3826                         'name' => 'wpSave',
3827                         'type' => 'submit',
3828                         'tabindex' => ++$tabindex,
3829                         'value' => wfMessage( 'savearticle' )->text(),
3830                 ) + Linker::tooltipAndAccesskeyAttribs( 'save' );
3831                 $buttons['save'] = Xml::element( 'input', $attribs, '' );
3832
3833                 ++$tabindex; // use the same for preview and live preview
3834                 $attribs = array(
3835                         'id' => 'wpPreview',
3836                         'name' => 'wpPreview',
3837                         'type' => 'submit',
3838                         'tabindex' => $tabindex,
3839                         'value' => wfMessage( 'showpreview' )->text(),
3840                 ) + Linker::tooltipAndAccesskeyAttribs( 'preview' );
3841                 $buttons['preview'] = Xml::element( 'input', $attribs, '' );
3842                 $buttons['live'] = '';
3843
3844                 $attribs = array(
3845                         'id' => 'wpDiff',
3846                         'name' => 'wpDiff',
3847                         'type' => 'submit',
3848                         'tabindex' => ++$tabindex,
3849                         'value' => wfMessage( 'showdiff' )->text(),
3850                 ) + Linker::tooltipAndAccesskeyAttribs( 'diff' );
3851                 $buttons['diff'] = Xml::element( 'input', $attribs, '' );
3852
3853                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3854                 return $buttons;
3855         }
3856
3857         /**
3858          * Output preview text only. This can be sucked into the edit page
3859          * via JavaScript, and saves the server time rendering the skin as
3860          * well as theoretically being more robust on the client (doesn't
3861          * disturb the edit box's undo history, won't eat your text on
3862          * failure, etc).
3863          *
3864          * @todo This doesn't include category or interlanguage links.
3865          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3866          *       or something...</s>" that might also require more skin
3867          *       initialization, so check whether that's a problem.
3868          */
3869         function livePreview() {
3870                 global $wgOut;
3871                 $wgOut->disable();
3872                 header( 'Content-type: text/xml; charset=utf-8' );
3873                 header( 'Cache-control: no-cache' );
3874
3875                 $previewText = $this->getPreviewText();
3876                 #$categories = $skin->getCategoryLinks();
3877
3878                 $s =
3879                         '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3880                         Xml::tags( 'livepreview', null,
3881                                 Xml::element( 'preview', null, $previewText )
3882                                 #.      Xml::element( 'category', null, $categories )
3883                         );
3884                 echo $s;
3885         }
3886
3887         /**
3888          * Creates a basic error page which informs the user that
3889          * they have attempted to edit a nonexistent section.
3890          */
3891         function noSuchSectionPage() {
3892                 global $wgOut;
3893
3894                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3895
3896                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3897                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3898                 $wgOut->addHTML( $res );
3899
3900                 $wgOut->returnToMain( false, $this->mTitle );
3901         }
3902
3903         /**
3904          * Show "your edit contains spam" page with your diff and text
3905          *
3906          * @param string|array|bool $match Text (or array of texts) which triggered one or more filters
3907          */
3908         public function spamPageWithContent( $match = false ) {
3909                 global $wgOut, $wgLang;
3910                 $this->textbox2 = $this->textbox1;
3911
3912                 if ( is_array( $match ) ) {
3913                         $match = $wgLang->listToText( $match );
3914                 }
3915                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3916
3917                 $wgOut->addHTML( '<div id="spamprotected">' );
3918                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3919                 if ( $match ) {
3920                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3921                 }
3922                 $wgOut->addHTML( '</div>' );
3923
3924                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3925                 $this->showDiff();
3926
3927                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3928                 $this->showTextbox2();
3929
3930                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3931         }
3932
3933         /**
3934          * Check if the browser is on a blacklist of user-agents known to
3935          * mangle UTF-8 data on form submission. Returns true if Unicode
3936          * should make it through, false if it's known to be a problem.
3937          * @return bool
3938          */
3939         private function checkUnicodeCompliantBrowser() {
3940                 global $wgBrowserBlackList, $wgRequest;
3941
3942                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3943                 if ( $currentbrowser === false ) {
3944                         // No User-Agent header sent? Trust it by default...
3945                         return true;
3946                 }
3947
3948                 foreach ( $wgBrowserBlackList as $browser ) {
3949                         if ( preg_match( $browser, $currentbrowser ) ) {
3950                                 return false;
3951                         }
3952                 }
3953                 return true;
3954         }
3955
3956         /**
3957          * Filter an input field through a Unicode de-armoring process if it
3958          * came from an old browser with known broken Unicode editing issues.
3959          *
3960          * @param WebRequest $request
3961          * @param string $field
3962          * @return string
3963          */
3964         protected function safeUnicodeInput( $request, $field ) {
3965                 $text = rtrim( $request->getText( $field ) );
3966                 return $request->getBool( 'safemode' )
3967                         ? $this->unmakeSafe( $text )
3968                         : $text;
3969         }
3970
3971         /**
3972          * Filter an output field through a Unicode armoring process if it is
3973          * going to an old browser with known broken Unicode editing issues.
3974          *
3975          * @param string $text
3976          * @return string
3977          */
3978         protected function safeUnicodeOutput( $text ) {
3979                 global $wgContLang;
3980                 $codedText = $wgContLang->recodeForEdit( $text );
3981                 return $this->checkUnicodeCompliantBrowser()
3982                         ? $codedText
3983                         : $this->makeSafe( $codedText );
3984         }
3985
3986         /**
3987          * A number of web browsers are known to corrupt non-ASCII characters
3988          * in a UTF-8 text editing environment. To protect against this,
3989          * detected browsers will be served an armored version of the text,
3990          * with non-ASCII chars converted to numeric HTML character references.
3991          *
3992          * Preexisting such character references will have a 0 added to them
3993          * to ensure that round-trips do not alter the original data.
3994          *
3995          * @param string $invalue
3996          * @return string
3997          */
3998         private function makeSafe( $invalue ) {
3999                 // Armor existing references for reversibility.
4000                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
4001
4002                 $bytesleft = 0;
4003                 $result = "";
4004                 $working = 0;
4005                 $valueLength = strlen( $invalue );
4006                 for ( $i = 0; $i < $valueLength; $i++ ) {
4007                         $bytevalue = ord( $invalue[$i] );
4008                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
4009                                 $result .= chr( $bytevalue );
4010                                 $bytesleft = 0;
4011                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
4012                                 $working = $working << 6;
4013                                 $working += ( $bytevalue & 0x3F );
4014                                 $bytesleft--;
4015                                 if ( $bytesleft <= 0 ) {
4016                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
4017                                 }
4018                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
4019                                 $working = $bytevalue & 0x1F;
4020                                 $bytesleft = 1;
4021                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
4022                                 $working = $bytevalue & 0x0F;
4023                                 $bytesleft = 2;
4024                         } else { // 1111 0xxx
4025                                 $working = $bytevalue & 0x07;
4026                                 $bytesleft = 3;
4027                         }
4028                 }
4029                 return $result;
4030         }
4031
4032         /**
4033          * Reverse the previously applied transliteration of non-ASCII characters
4034          * back to UTF-8. Used to protect data from corruption by broken web browsers
4035          * as listed in $wgBrowserBlackList.
4036          *
4037          * @param string $invalue
4038          * @return string
4039          */
4040         private function unmakeSafe( $invalue ) {
4041                 $result = "";
4042                 $valueLength = strlen( $invalue );
4043                 for ( $i = 0; $i < $valueLength; $i++ ) {
4044                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
4045                                 $i += 3;
4046                                 $hexstring = "";
4047                                 do {
4048                                         $hexstring .= $invalue[$i];
4049                                         $i++;
4050                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
4051
4052                                 // Do some sanity checks. These aren't needed for reversibility,
4053                                 // but should help keep the breakage down if the editor
4054                                 // breaks one of the entities whilst editing.
4055                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
4056                                         $codepoint = hexdec( $hexstring );
4057                                         $result .= codepointToUtf8( $codepoint );
4058                                 } else {
4059                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
4060                                 }
4061                         } else {
4062                                 $result .= substr( $invalue, $i, 1 );
4063                         }
4064                 }
4065                 // reverse the transform that we made for reversibility reasons.
4066                 return strtr( $result, array( "&#x0" => "&#x" ) );
4067         }
4068 }